Merge branch 'master' into DRTVWR-460

# Conflicts:
#	indra/llmath/llquaternion.h
#	indra/newview/lldrawpoolwater.cpp
#	indra/newview/lljoystickbutton.cpp
#	indra/newview/llvosky.cpp
#	indra/newview/skins/default/textures/textures.xml

137 files changed, 3463 insertions, 3143 deletions

diff --git a/indra/newview/app_settings/shaders/class1/avatar/avatarV.glsl b/indra/newview/app_settings/shaders/class1/avatar/avatarV.glsl
index 19203ab670..0543a26642 100644
--- a/indra/newview/app_settings/shaders/class1/avatar/avatarV.glsl
+++ b/indra/newview/app_settings/shaders/class1/avatar/avatarV.glsl
@@ -34,7 +34,7 @@ VARYING vec2 vary_texcoord0;
 
 uniform vec4 color;
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 mat4 getSkinnedTransform();
 void calcAtmospherics(vec3 inPositionEye);
 
@@ -62,7 +62,7 @@ void main()
 	
 	calcAtmospherics(pos.xyz);
 
-	vec4 col = calcLighting(pos.xyz, norm, color, vec4(0,0,0,0));
+	vec4 col = calcLighting(pos.xyz, norm, color);
 	vertex_color = col; 
 
 }
diff --git a/indra/newview/app_settings/shaders/class1/avatar/eyeballV.glsl b/indra/newview/app_settings/shaders/class1/avatar/eyeballV.glsl
index 82db15c3ae..fac1599c6b 100644
--- a/indra/newview/app_settings/shaders/class1/avatar/eyeballV.glsl
+++ b/indra/newview/app_settings/shaders/class1/avatar/eyeballV.glsl
@@ -36,7 +36,7 @@ ATTRIBUTE vec2 texcoord0;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-vec4 calcLightingSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor, vec4 baseCol);
+vec4 calcLightingSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor);
 void calcAtmospherics(vec3 inPositionEye);
 
 void main()
@@ -52,7 +52,7 @@ void main()
 	calcAtmospherics(pos.xyz);
 
 	vec4 specular = vec4(1.0);
-	vec4 color = calcLightingSpecular(pos, norm, diffuse_color, specular, vec4(0.0));	
+	vec4 color = calcLightingSpecular(pos, norm, diffuse_color, specular);	
 	vertex_color = color;
 
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index b9c8f34cb0..dc484317e9 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -22,7 +22,9 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
+
+//class1/deferred/alphaF.glsl
+
 #extension GL_ARB_texture_rectangle : enable
 
 /*[EXTRA_CODE_HERE]*/
@@ -37,39 +39,9 @@ out vec4 frag_color;
 #define frag_color gl_FragColor
 #endif
 
-uniform float display_gamma;
-uniform vec4 gamma;
-uniform vec4 lightnorm;
-uniform vec4 sunlight_color;
-uniform vec4 ambient;
-uniform vec4 blue_horizon;
-uniform vec4 blue_density;
-uniform float haze_horizon;
-uniform float haze_density;
-uniform float cloud_shadow;
-uniform float density_multiplier;
-uniform float distance_multiplier;
-uniform float max_y;
-uniform vec4 glow;
-uniform float scene_light_strength;
 uniform mat3 env_mat;
-uniform mat3 ssao_effect_mat;
-
 uniform vec3 sun_dir;
-
-#if HAS_SHADOW
-uniform sampler2DShadow shadowMap0;
-uniform sampler2DShadow shadowMap1;
-uniform sampler2DShadow shadowMap2;
-uniform sampler2DShadow shadowMap3;
-
-uniform vec2 shadow_res;
-
-uniform mat4 shadow_matrix[6];
-uniform vec4 shadow_clip;
-uniform float shadow_bias;
-
-#endif
+uniform vec3 moon_dir;
 
 #ifdef USE_DIFFUSE_TEX
 uniform sampler2D diffuseMap;
@@ -81,551 +53,254 @@ VARYING vec2 vary_texcoord0;
 VARYING vec3 vary_norm;
 
 #ifdef USE_VERTEX_COLOR
-VARYING vec4 vertex_color;
+VARYING vec4 vertex_color; //vertex color should be treated as sRGB
 #endif
 
-vec3 vary_PositionEye;
-vec3 vary_SunlitColor;
-vec3 vary_AmblitColor;
-vec3 vary_AdditiveColor;
-vec3 vary_AtmosAttenuation;
-
+uniform mat4 proj_mat;
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
-
+uniform int sun_up_factor;
 uniform vec4 light_position[8];
 uniform vec3 light_direction[8];
-uniform vec3 light_attenuation[8]; 
+uniform vec4 light_attenuation[8]; 
 uniform vec3 light_diffuse[8];
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
+#ifdef WATER_FOG
+vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-}
+vec3 srgb_to_linear(vec3 c);
+vec3 linear_to_srgb(vec3 c);
 
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
+vec2 encode_normal (vec3 n);
+vec3 scaleSoftClipFrag(vec3 l);
+vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten);
 
-}
+void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 atten, out vec3 additive, bool use_ao);
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+#ifdef HAS_SHADOW
+float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen);
+#endif
 
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
+float getAmbientClamp();
 
-vec3 calcDirectionalLight(vec3 n, vec3 l)
+vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 diffuse, vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight, float ambiance)
 {
-	float a = max(dot(n,l),0.0);
-	a = pow(a, 1.0/1.3);
-	return vec3(a,a,a);
-}
+    vec3 col = vec3(0);
 
-vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 diffuse, vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight)
-{
 	//get light vector
 	vec3 lv = lp.xyz-v;
-	
+
 	//get distance
-	float d = length(lv);
-	
+	float dist = length(lv);
 	float da = 1.0;
 
-	vec3 col = vec3(0);
-
-	if (d > 0.0 && la > 0.0 && fa > 0.0)
+    /*if (dist > la)
+    {
+        return col;
+    }
+
+    clip to projector bounds
+     vec4 proj_tc = proj_mat * lp;
+
+    if (proj_tc.z < 0
+     || proj_tc.z > 1
+     || proj_tc.x < 0
+     || proj_tc.x > 1 
+     || proj_tc.y < 0
+     || proj_tc.y > 1)
+    {
+        return col;
+    }*/
+
+	if (dist > 0.0 && la > 0.0)
 	{
+        dist /= la;
+
 		//normalize light vector
 		lv = normalize(lv);
 	
 		//distance attenuation
-		float dist = d/la;
 		float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
 		dist_atten *= dist_atten;
-		dist_atten *= 2.0;
+        dist_atten *= 2.0f;
+
+        if (dist_atten <= 0.0)
+        {
+           return col;
+        }
 
 		// spotlight coefficient.
 		float spot = max(dot(-ln, lv), is_pointlight);
 		da *= spot*spot; // GL_SPOT_EXPONENT=2
 
 		//angular attenuation
-		da *= max(dot(n, lv), 0.0);		
-
-		float lit = max(da * dist_atten,0.0);
-
-		col = light_col * lit * diffuse;
-
-		// no spec for alpha shader...
-	}
-
-	return max(col, vec3(0.0,0.0,0.0));
+		da *= dot(n, lv);
+        da = max(0.0, da);
+
+		float lit = 0.0f;
+
+        float amb_da = 0.0;//ambiance;
+        if (da > 0)
+        {
+		    lit = max(da * dist_atten,0.0);
+            col = lit * light_col * diffuse;
+            amb_da += (da*0.5+0.5) * ambiance;
+        }
+        amb_da += (da*da*0.5 + 0.5) * ambiance;
+        amb_da *= dist_atten;
+        amb_da = min(amb_da, 1.0f - lit);
+
+        // SL-10969 ... need to work out why this blows out in many setups...
+        //col.rgb += amb_da * light_col * diffuse;
+
+        // no spec for alpha shader...
+    }
+    col = max(col, vec3(0));
+    return col;
 }
 
-#if HAS_SHADOW
-float pcfShadow(sampler2DShadow shadowMap, vec4 stc)
+void main() 
 {
-	stc.xyz /= stc.w;
-	stc.z += shadow_bias;
-		
-	stc.x = floor(stc.x*shadow_res.x + fract(stc.y*shadow_res.y*12345))/shadow_res.x; // add some chaotic jitter to X sample pos according to Y to disguise the snapping going on here
-	
-	float cs = shadow2D(shadowMap, stc.xyz).x;
-	float shadow = cs;
-	
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(2.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(1.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(-1.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(-2.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
-                       
-    return shadow*0.2;
-}
-#endif
+    vec2 frag = vary_fragcoord.xy/vary_fragcoord.z*0.5+0.5;
+    frag *= screen_res;
+    
+    vec4 pos = vec4(vary_position, 1.0);
+    vec3 norm = vary_norm;
 
-#ifdef WATER_FOG
-uniform vec4 waterPlane;
-uniform vec4 waterFogColor;
-uniform float waterFogDensity;
-uniform float waterFogKS;
-
-vec4 applyWaterFogDeferred(vec3 pos, vec4 color)
-{
-	//normalize view vector
-	vec3 view = normalize(pos);
-	float es = -(dot(view, waterPlane.xyz));
+    float shadow = 1.0f;
 
-	//find intersection point with water plane and eye vector
-	
-	//get eye depth
-	float e0 = max(-waterPlane.w, 0.0);
-	
-	vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
-	
-	//get object depth
-	float depth = length(pos - int_v);
-		
-	//get "thickness" of water
-	float l = max(depth, 0.1);
-
-	float kd = waterFogDensity;
-	float ks = waterFogKS;
-	vec4 kc = waterFogColor;
-	
-	float F = 0.98;
-	
-	float t1 = -kd * pow(F, ks * e0);
-	float t2 = kd + ks * es;
-	float t3 = pow(F, t2*l) - 1.0;
-	
-	float L = min(t1/t2*t3, 1.0);
-	
-	float D = pow(0.98, l*kd);
-	
-	color.rgb = color.rgb * D + kc.rgb * L;
-	color.a = kc.a + color.a;
-	
-	return color;
-}
+#ifdef HAS_SHADOW
+    shadow = sampleDirectionalShadow(pos.xyz, norm.xyz, frag);
 #endif
 
-vec3 getSunlitColor()
-{
-	return vary_SunlitColor;
-}
-vec3 getAmblitColor()
-{
-	return vary_AmblitColor;
-}
-vec3 getAdditiveColor()
-{
-	return vary_AdditiveColor;
-}
-vec3 getAtmosAttenuation()
-{
-	return vary_AtmosAttenuation;
-}
-
-void setPositionEye(vec3 v)
-{
-	vary_PositionEye = v;
-}
-
-void setSunlitColor(vec3 v)
-{
-	vary_SunlitColor = v;
-}
-
-void setAmblitColor(vec3 v)
-{
-	vary_AmblitColor = v;
-}
-
-void setAdditiveColor(vec3 v)
-{
-	vary_AdditiveColor = v;
-}
-
-void setAtmosAttenuation(vec3 v)
-{
-	vary_AtmosAttenuation = v;
-}
-
-void calcAtmospherics(vec3 inPositionEye, float ambFactor) {
-
-	vec3 P = inPositionEye;
-	setPositionEye(P);
-	
-	vec3 tmpLightnorm = lightnorm.xyz;
-
-	vec3 Pn = normalize(P);
-	float Plen = length(P);
-
-	vec4 temp1 = vec4(0);
-	vec3 temp2 = vec3(0);
-	vec4 blue_weight;
-	vec4 haze_weight;
-	vec4 sunlight = sunlight_color;
-	vec4 light_atten;
-
-	//sunlight attenuation effect (hue and brightness) due to atmosphere
-	//this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
-		//I had thought blue_density and haze_density should have equal weighting,
-		//but attenuation due to haze_density tends to seem too strong
-
-	temp1 = blue_density + vec4(haze_density);
-	blue_weight = blue_density / temp1;
-	haze_weight = vec4(haze_density) / temp1;
-
-	//(TERRAIN) compute sunlight from lightnorm only (for short rays like terrain)
-	temp2.y = max(0.0, tmpLightnorm.y);
-	temp2.y = 1. / temp2.y;
-	sunlight *= exp( - light_atten * temp2.y);
-
-	// main atmospheric scattering line integral
-	temp2.z = Plen * density_multiplier;
-
-	// Transparency (-> temp1)
-	// ATI Bugfix -- can't store temp1*temp2.z*distance_multiplier in a variable because the ati
-	// compiler gets confused.
-	temp1 = exp(-temp1 * temp2.z * distance_multiplier);
-
-	//final atmosphere attenuation factor
-	setAtmosAttenuation(temp1.rgb);
-	
-	//compute haze glow
-	//(can use temp2.x as temp because we haven't used it yet)
-	temp2.x = dot(Pn, tmpLightnorm.xyz);
-	temp2.x = 1. - temp2.x;
-		//temp2.x is 0 at the sun and increases away from sun
-	temp2.x = max(temp2.x, .03);	//was glow.y
-		//set a minimum "angle" (smaller glow.y allows tighter, brighter hotspot)
-	temp2.x *= glow.x;
-		//higher glow.x gives dimmer glow (because next step is 1 / "angle")
-	temp2.x = pow(temp2.x, glow.z);
-		//glow.z should be negative, so we're doing a sort of (1 / "angle") function
-
-	//add "minimum anti-solar illumination"
-	temp2.x += .25;
-	
-	//increase ambient when there are more clouds
-	vec4 tmpAmbient = ambient + (vec4(1.) - ambient) * cloud_shadow * 0.5;
-	
-	/*  decrease value and saturation (that in HSV, not HSL) for occluded areas
-	 * // for HSV color/geometry used here, see http://gimp-savvy.com/BOOK/index.html?node52.html
-	 * // The following line of code performs the equivalent of:
-	 * float ambAlpha = tmpAmbient.a;
-	 * float ambValue = dot(vec3(tmpAmbient), vec3(0.577)); // projection onto <1/rt(3), 1/rt(3), 1/rt(3)>, the neutral white-black axis
-	 * vec3 ambHueSat = vec3(tmpAmbient) - vec3(ambValue);
-	 * tmpAmbient = vec4(RenderSSAOEffect.valueFactor * vec3(ambValue) + RenderSSAOEffect.saturationFactor *(1.0 - ambFactor) * ambHueSat, ambAlpha);
-	 */
-	tmpAmbient = vec4(mix(ssao_effect_mat * tmpAmbient.rgb, tmpAmbient.rgb, ambFactor), tmpAmbient.a);
-
-	//haze color
-	setAdditiveColor(
-		vec3(blue_horizon * blue_weight * (sunlight*(1.-cloud_shadow) + tmpAmbient)
-	  + (haze_horizon * haze_weight) * (sunlight*(1.-cloud_shadow) * temp2.x
-		  + tmpAmbient)));
-
-	//brightness of surface both sunlight and ambient
-	setSunlitColor(vec3(sunlight * .5));
-	setAmblitColor(vec3(tmpAmbient * .25));
-	setAdditiveColor(getAdditiveColor() * vec3(1.0 - temp1));
-}
+#ifdef USE_DIFFUSE_TEX
+    vec4 diffuse_tap = texture2D(diffuseMap,vary_texcoord0.xy);
+#endif
 
-vec3 atmosLighting(vec3 light)
-{
-	light *= getAtmosAttenuation().r;
-	light += getAdditiveColor();
-	return (2.0 * light);
-}
+#ifdef USE_INDEXED_TEX
+    vec4 diffuse_tap = diffuseLookup(vary_texcoord0.xy);
+#endif
 
-vec3 atmosTransport(vec3 light) {
-	light *= getAtmosAttenuation().r;
-	light += getAdditiveColor() * 2.0;
-	return light;
-}
-vec3 atmosGetDiffuseSunlightColor()
-{
-	return getSunlitColor();
-}
+    vec4 diffuse_srgb = diffuse_tap;
+    vec4 diffuse_linear = vec4(srgb_to_linear(diffuse_srgb.rgb), diffuse_srgb.a);
 
-vec3 scaleDownLight(vec3 light)
-{
-	return (light / vec3(scene_light_strength, scene_light_strength, scene_light_strength));
-}
+#ifdef FOR_IMPOSTOR
+    vec4 color;
+    color.rgb = diffuse_srgb.rgb;
+    color.a = 1.0;
+
+    float final_alpha = diffuse_srgb.a * vertex_color.a;
+    diffuse_srgb.rgb *= vertex_color.rgb;
+    diffuse_linear.rgb = srgb_to_linear(diffuse_srgb.rgb); 
+    
+    // Insure we don't pollute depth with invis pixels in impostor rendering
+    //
+    if (final_alpha < 0.01)
+    {
+        discard;
+    }
+#else
+    
+    vec3 light_dir = (sun_up_factor == 1) ? sun_dir: moon_dir;
 
-vec3 scaleUpLight(vec3 light)
-{
-	return (light * vec3(scene_light_strength, scene_light_strength, scene_light_strength));
-}
+    float final_alpha = diffuse_linear.a;
 
-vec3 atmosAmbient(vec3 light)
-{
-	return getAmblitColor() + (light * vec3(0.5f, 0.5f, 0.5f));
-}
+#ifdef USE_VERTEX_COLOR
+    final_alpha *= vertex_color.a;
+    diffuse_srgb.rgb *= vertex_color.rgb;
+    diffuse_linear.rgb = srgb_to_linear(diffuse_srgb.rgb);
+#endif
 
-vec3 atmosAffectDirectionalLight(float lightIntensity)
-{
-	return getSunlitColor() * vec3(lightIntensity, lightIntensity, lightIntensity);
-}
+    vec3 sunlit;
+    vec3 amblit;
+    vec3 additive;
+    vec3 atten;
 
-vec3 scaleSoftClip(vec3 light)
-{
-	//soft clip effect:
-    vec3 zeroes = vec3(0.0f, 0.0f, 0.0f);
-    vec3 ones   = vec3(1.0f, 1.0f, 1.0f);
+    calcAtmosphericVars(pos.xyz, light_dir, 1.0, sunlit, amblit, additive, atten, false);
 
-	light = ones - clamp(light, zeroes, ones);
-	light = ones - pow(light, gamma.xxx);
+    vec2 abnormal = encode_normal(norm.xyz);
 
-	return light;
-}
+    float da = dot(norm.xyz, light_dir.xyz);
+          da = clamp(da, -1.0, 1.0);
+          da = pow(da, 1.0/1.3);
+ 
+    float final_da = da;
+          final_da = clamp(final_da, 0.0f, 1.0f);
 
-vec3 fullbrightAtmosTransport(vec3 light) {
-	float brightness = dot(light.rgb, vec3(0.33333));
+    vec4 color = vec4(0.0);
 
-	return mix(atmosTransport(light.rgb), light.rgb + getAdditiveColor().rgb, brightness * brightness);
-}
+    color.a   = final_alpha;
 
-vec3 fullbrightScaleSoftClip(vec3 light)
-{
-	//soft clip effect:
-	return light;
-}
+    float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0);
+    ambient *= 0.5;
+    ambient *= ambient;
+    ambient = (1.0 - ambient);
 
-void main() 
-{
-	vec2 frag = vary_fragcoord.xy/vary_fragcoord.z*0.5+0.5;
-	frag *= screen_res;
-	
-	vec4 pos = vec4(vary_position, 1.0);
-	
-	float shadow = 1.0;
-
-#if HAS_SHADOW
-	vec4 spos = pos;
-		
-	if (spos.z > -shadow_clip.w)
-	{	
-		shadow = 0.0;
-
-		vec4 lpos;
-		
-		vec4 near_split = shadow_clip*-0.75;
-		vec4 far_split = shadow_clip*-1.25;
-		vec4 transition_domain = near_split-far_split;
-		float weight = 0.0;
-
-		if (spos.z < near_split.z)
-		{
-			lpos = shadow_matrix[3]*spos;
-			
-			float w = 1.0;
-			w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
-			shadow += pcfShadow(shadowMap3, lpos)*w;
-			weight += w;
-			shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
-		}
-
-		if (spos.z < near_split.y && spos.z > far_split.z)
-		{
-			lpos = shadow_matrix[2]*spos;
-			
-			float w = 1.0;
-			w -= max(spos.z-far_split.y, 0.0)/transition_domain.y;
-			w -= max(near_split.z-spos.z, 0.0)/transition_domain.z;
-			shadow += pcfShadow(shadowMap2, lpos)*w;
-			weight += w;
-		}
-
-		if (spos.z < near_split.x && spos.z > far_split.y)
-		{
-			lpos = shadow_matrix[1]*spos;
-			
-			float w = 1.0;
-			w -= max(spos.z-far_split.x, 0.0)/transition_domain.x;
-			w -= max(near_split.y-spos.z, 0.0)/transition_domain.y;
-			shadow += pcfShadow(shadowMap1, lpos)*w;
-			weight += w;
-		}
-
-		if (spos.z > far_split.x)
-		{
-			lpos = shadow_matrix[0]*spos;
-							
-			float w = 1.0;
-			w -= max(near_split.x-spos.z, 0.0)/transition_domain.x;
-				
-			shadow += pcfShadow(shadowMap0, lpos)*w;
-			weight += w;
-		}
-		
-
-		shadow /= weight;
-	}
-	else
-	{
-		shadow = 1.0;
-	}
-#endif
+    vec3 sun_contrib = min(final_da, shadow) * sunlit;
 
-#ifdef USE_INDEXED_TEX
-	vec4 diff = diffuseLookup(vary_texcoord0.xy);
-#else
-	vec4 diff = texture2D(diffuseMap,vary_texcoord0.xy);
+#if !defined(AMBIENT_KILL)
+    color.rgb = amblit;
+    color.rgb *= ambient;
 #endif
 
-#ifdef FOR_IMPOSTOR
-	vec4 color;
-	color.rgb = diff.rgb;
-	color.a = 1.0;
+vec3 post_ambient = color.rgb;
 
-#ifdef USE_VERTEX_COLOR
-	float final_alpha = diff.a * vertex_color.a;
-	diff.rgb *= vertex_color.rgb;
-#else
-	float final_alpha = diff.a;
-#endif
-	
-	// Insure we don't pollute depth with invis pixels in impostor rendering
-	//
-	if (final_alpha < 0.01)
-	{
-		discard;
-	}
-#else
-	
-#ifdef USE_VERTEX_COLOR
-	float final_alpha = diff.a * vertex_color.a;
-	diff.rgb *= vertex_color.rgb;
-#else
-	float final_alpha = diff.a;
+#if !defined(SUNLIGHT_KILL)
+    color.rgb += sun_contrib;
 #endif
 
+vec3 post_sunlight = color.rgb;
 
-	vec4 gamma_diff = diff;	
-	diff.rgb = srgb_to_linear(diff.rgb);
+    color.rgb *= diffuse_srgb.rgb;
 
-	vec3 norm = vary_norm; 
+vec3 post_diffuse = color.rgb;
 
-	calcAtmospherics(pos.xyz, 1.0);
+    color.rgb = atmosFragLighting(color.rgb, additive, atten);
 
-	vec2 abnormal	= encode_normal(norm.xyz);
-		 norm.xyz   = decode_normal(abnormal.xy);
+vec3 post_atmo = color.rgb;
 
-	float da = dot(norm.xyz, sun_dir.xyz);
+    vec4 light = vec4(0,0,0,0);
+    
+    color.rgb = scaleSoftClipFrag(color.rgb);
 
-    float final_da = da;
-          final_da = min(final_da, shadow);
-          final_da = max(final_da, 0.0f);
-		  final_da = min(final_da, 1.0f);
-		  final_da = pow(final_da, 1.0/1.3);
+    //convert to linear before applying local lights
+    color.rgb = srgb_to_linear(color.rgb);
 
-	vec4 color = vec4(0,0,0,0);
+   #define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, diffuse_linear.rgb, pos.xyz, norm, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z, light_attenuation[i].w);
 
-	color.rgb = atmosAmbient(color.rgb);
-	color.a   = final_alpha;
-
-	float ambient = abs(da);
-	ambient *= 0.5;
-	ambient *= ambient;
-	ambient = (1.0-ambient);
-
-	color.rgb *= ambient;
-	color.rgb += atmosAffectDirectionalLight(final_da);
-	color.rgb *= gamma_diff.rgb;
-
-	//color.rgb = mix(diff.rgb, color.rgb, final_alpha);
-	
-	color.rgb = atmosLighting(color.rgb);
-	color.rgb = scaleSoftClip(color.rgb);
+    LIGHT_LOOP(1)
+    LIGHT_LOOP(2)
+    LIGHT_LOOP(3)
+    LIGHT_LOOP(4)
+    LIGHT_LOOP(5)
+    LIGHT_LOOP(6)
+    LIGHT_LOOP(7)
 
-	vec4 light = vec4(0,0,0,0);
-
-	color.rgb = srgb_to_linear(color.rgb);
-	
-   #define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, diff.rgb, pos.xyz, norm, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z);
-
-	LIGHT_LOOP(1)
-	LIGHT_LOOP(2)
-	LIGHT_LOOP(3)
-	LIGHT_LOOP(4)
-	LIGHT_LOOP(5)
-	LIGHT_LOOP(6)
-	LIGHT_LOOP(7)
-
-	// keep it linear
-	//
-	color.rgb += light.rgb;
-
-	// straight to display gamma, we're post-deferred
-	//
-	color.rgb = linear_to_srgb(color.rgb);
+    // sum local light contrib in linear colorspace
+#if !defined(LOCAL_LIGHT_KILL)
+    color.rgb += light.rgb;
+#endif
+    // back to sRGB as we're going directly to the final RT post-deferred gamma correction
+    color.rgb = linear_to_srgb(color.rgb);
+
+//color.rgb = amblit;
+//color.rgb = vec3(ambient);
+//color.rgb = sunlit;
+//color.rgb = vec3(final_da);
+//color.rgb = post_ambient;
+//color.rgb = post_sunlight;
+//color.rgb = sun_contrib;
+//color.rgb = diffuse_srgb.rgb;
+//color.rgb = post_diffuse;
+//color.rgb = post_atmo;
 
 #ifdef WATER_FOG
-	color = applyWaterFogDeferred(pos.xyz, color);
-#endif
+    color = applyWaterFogView(pos.xyz, color);
+#endif // WATER_FOG
 
 #endif
-
-	frag_color = color;
+    
+    frag_color = color;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl
new file mode 100644
index 0000000000..23adbded5e
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl
@@ -0,0 +1,123 @@
+/** 
+ * @file class1/deferred/aoUtil.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform sampler2D       noiseMap;
+uniform sampler2DRect   normalMap;
+uniform sampler2DRect   depthMap;
+
+uniform float ssao_radius;
+uniform float ssao_max_radius;
+uniform float ssao_factor;
+uniform float ssao_factor_inv;
+
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+
+vec2 getScreenCoordinateAo(vec2 screenpos)
+{
+    vec2 sc = screenpos.xy * 2.0;
+    if (screen_res.x > 0 && screen_res.y > 0)
+    {
+       sc /= screen_res;
+    }
+    return sc - vec2(1.0, 1.0);
+}
+
+float getDepthAo(vec2 pos_screen)
+{
+    float depth = texture2DRect(depthMap, pos_screen).r;
+    return depth;
+}
+
+vec4 getPositionAo(vec2 pos_screen)
+{
+    float depth = getDepthAo(pos_screen);
+    vec2 sc = getScreenCoordinateAo(pos_screen);
+    vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
+    vec4 pos = inv_proj * ndc;
+    pos /= pos.w;
+    pos.w = 1.0;
+    return pos;
+}
+
+vec2 getKern(int i)
+{
+    vec2 kern[8];
+    // exponentially (^2) distant occlusion samples spread around origin
+    kern[0] = vec2(-1.0, 0.0) * 0.125*0.125;
+    kern[1] = vec2(1.0, 0.0) * 0.250*0.250;
+    kern[2] = vec2(0.0, 1.0) * 0.375*0.375;
+    kern[3] = vec2(0.0, -1.0) * 0.500*0.500;
+    kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625;
+    kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750;
+    kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875;
+    kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000;
+       
+    return kern[i];
+}
+
+//calculate decreases in ambient lighting when crowded out (SSAO)
+float calcAmbientOcclusion(vec4 pos, vec3 norm, vec2 pos_screen)
+{
+    float ret = 1.0;
+    vec3 pos_world = pos.xyz;
+    vec2 noise_reflect = texture2D(noiseMap, pos_screen.xy/128.0).xy;
+        
+    float angle_hidden = 0.0;
+    float points = 0;
+        
+    float scale = min(ssao_radius / -pos_world.z, ssao_max_radius);
+    
+    // it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?)
+    for (int i = 0; i < 8; i++)
+    {
+        vec2 samppos_screen = pos_screen + scale * reflect(getKern(i), noise_reflect);
+        vec3 samppos_world = getPositionAo(samppos_screen).xyz; 
+        
+        vec3 diff = pos_world - samppos_world;
+        float dist2 = dot(diff, diff);
+            
+        // assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area
+        // --> solid angle shrinking by the square of distance
+        //radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2
+        //(k should vary inversely with # of samples, but this is taken care of later)
+        
+        float funky_val = (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) ? 1.0 : 0.0;
+        angle_hidden = angle_hidden + funky_val * min(1.0/dist2, ssao_factor_inv);
+            
+        // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" 
+        float diffz_val = (diff.z > -1.0) ? 1.0 : 0.0;
+        points = points + diffz_val;
+    }
+        
+    angle_hidden = min(ssao_factor*angle_hidden/points, 1.0);
+    
+    float points_val = (points > 0.0) ? 1.0 : 0.0;
+    ret = (1.0 - (points_val * angle_hidden));
+
+    ret = max(ret, 0.0);
+    return min(ret, 1.0);
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowF.glsl
index 22c9a4d14e..8e9a5fcd41 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowF.glsl
@@ -22,6 +22,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
diff --git a/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl b/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl
index 3f90600ace..0fa0edfd67 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl
@@ -41,7 +41,7 @@ void main()
 	
 
 	vec4 p = projection_matrix * vec4(pos, 1.0);
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 	p.z = max(p.z, -p.w+0.01);
 	gl_Position = p;
 #else
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaNoColorV.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaNoColorV.glsl
index c8ddefac26..bbdc8fdd1c 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaNoColorV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaNoColorV.glsl
@@ -29,17 +29,13 @@ ATTRIBUTE vec3 position;
 ATTRIBUTE vec3 normal;
 ATTRIBUTE vec2 texcoord0;
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
 mat4 getSkinnedTransform();
 void calcAtmospherics(vec3 inPositionEye);
 
 float calcDirectionalLight(vec3 n, vec3 l);
-float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float is_pointlight);
 
-vec3 atmosAmbient(vec3 light);
+vec3 atmosAmbient();
 vec3 atmosAffectDirectionalLight(float lightIntensity);
-vec3 scaleDownLight(vec3 light);
-vec3 scaleUpLight(vec3 light);
 
 VARYING vec3 vary_position;
 VARYING vec3 vary_ambient;
@@ -59,41 +55,7 @@ uniform vec3 light_direction[8];
 uniform vec3 light_attenuation[8]; 
 uniform vec3 light_diffuse[8];
 
-float calcDirectionalLight(vec3 n, vec3 l)
-{
-        float a = max(dot(n,l),0.0);
-        return a;
-}
-
-float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight)
-{
-	//get light vector
-	vec3 lv = lp.xyz-v;
-	
-	//get distance
-	float d = dot(lv,lv);
-	
-	float da = 0.0;
-
-	if (d > 0.0 && la > 0.0 && fa > 0.0)
-	{
-		//normalize light vector
-		lv = normalize(lv);
-	
-		//distance attenuation
-		float dist2 = d/la;
-		da = clamp(1.0-(dist2-1.0*(1.0-fa))/fa, 0.0, 1.0);
-
-		// spotlight coefficient.
-		float spot = max(dot(-ln, lv), is_pointlight);
-		da *= spot*spot; // GL_SPOT_EXPONENT=2
-
-		//angular attenuation
-		da *= max(dot(n, lv), 0.0);		
-	}
-
-	return da;	
-}
+float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight);
 
 void main()
 {
@@ -137,7 +99,7 @@ void main()
 	col.rgb = vec3(0,0,0);
 
 	// Add windlight lights
-	col.rgb = atmosAmbient(vec3(0.));
+	col.rgb = atmosAmbient();
 	
 	vary_ambient = col.rgb*color.rgb;
 	vary_directional = color.rgb*atmosAffectDirectionalLight(max(calcDirectionalLight(norm, light_position[0].xyz), 0.0));
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarF.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarF.glsl
index 662c762bca..60d83cc623 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/avatarF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -36,11 +38,7 @@ uniform float minimum_alpha;
 VARYING vec3 vary_normal;
 VARYING vec2 vary_texcoord0;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl
index b809b73973..50020a50d8 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl
@@ -22,7 +22,9 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
+
+/*[EXTRA_CODE_HERE]*/ 
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
@@ -31,7 +33,7 @@ out vec4 frag_color;
 
 uniform sampler2D diffuseMap;
 
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 VARYING vec4 post_pos;
 #endif
 
@@ -39,7 +41,7 @@ void main()
 {
 	frag_color = vec4(1,1,1,1);
 
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
 #endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarShadowV.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarShadowV.glsl
index bde1ad4e9f..91b25613e0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarShadowV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/avatarShadowV.glsl
@@ -31,7 +31,7 @@ ATTRIBUTE vec3 position;
 ATTRIBUTE vec3 normal;
 ATTRIBUTE vec2 texcoord0;
 
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 VARYING vec4 post_pos;
 #endif
 
@@ -53,7 +53,7 @@ void main()
 	norm = normalize(norm);
 	
 	pos = projection_matrix * pos;
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 	post_pos = pos;
 
 	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
diff --git a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
index cbd8d2ebfc..596d0274af 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
@@ -33,7 +33,6 @@ out vec4 frag_color;
 #define frag_color gl_FragColor
 #endif
 
-uniform sampler2DRect depthMap;
 uniform sampler2DRect normalMap;
 uniform sampler2DRect lightMap;
 
@@ -45,100 +44,68 @@ uniform float kern_scale;
 
 VARYING vec2 vary_fragcoord;
 
-uniform mat4 inv_proj;
-uniform vec2 screen_res;
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
-
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
 
 void main() 
 {
     vec2 tc = vary_fragcoord.xy;
-	vec3 norm = texture2DRect(normalMap, tc).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
-
-	vec3 pos = getPosition(tc).xyz;
-	vec4 ccol = texture2DRect(lightMap, tc).rgba;
-	
-	vec2 dlt = kern_scale * delta / (1.0+norm.xy*norm.xy);
-	dlt /= max(-pos.z*dist_factor, 1.0);
-	
-	vec2 defined_weight = kern[0].xy; // special case the first (centre) sample's weight in the blur; we have to sample it anyway so we get it for 'free'
-	vec4 col = defined_weight.xyxx * ccol;
-
-	// relax tolerance according to distance to avoid speckling artifacts, as angles and distances are a lot more abrupt within a small screen area at larger distances
-	float pointplanedist_tolerance_pow2 = pos.z*pos.z*0.00005;
-
-	// perturb sampling origin slightly in screen-space to hide edge-ghosting artifacts where smoothing radius is quite large
-	float tc_mod = 0.5*(tc.x + tc.y); // mod(tc.x+tc.y,2)
-	tc_mod -= floor(tc_mod);
-	tc_mod *= 2.0;
-	tc += ( (tc_mod - 0.5) * kern[1].z * dlt * 0.5 );
-
-	for (int i = 1; i < 4; i++)
-	{
-		vec2 samptc = tc + kern[i].z*dlt;
-	    vec3 samppos = getPosition(samptc).xyz; 
-
-		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		
-		if (d*d <= pointplanedist_tolerance_pow2)
-		{
-			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
-			defined_weight += kern[i].xy;
-		}
-	}
-
-	for (int i = 1; i < 4; i++)
-	{
-		vec2 samptc = tc - kern[i].z*dlt;
-	    vec3 samppos = getPosition(samptc).xyz; 
-
-		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		
-		if (d*d <= pointplanedist_tolerance_pow2)
-		{
-			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
-			defined_weight += kern[i].xy;
-		}
-	}
-
-	col /= defined_weight.xyxx;
-	col.y *= col.y;
-	
-	frag_color = col;
+    vec3 norm = getNorm(tc);
+    vec3 pos = getPosition(tc).xyz;
+    vec4 ccol = texture2DRect(lightMap, tc).rgba;
+    
+    vec2 dlt = kern_scale * delta / (1.0+norm.xy*norm.xy);
+    dlt /= max(-pos.z*dist_factor, 1.0);
+    
+    vec2 defined_weight = kern[0].xy; // special case the first (centre) sample's weight in the blur; we have to sample it anyway so we get it for 'free'
+    vec4 col = defined_weight.xyxx * ccol;
+
+    // relax tolerance according to distance to avoid speckling artifacts, as angles and distances are a lot more abrupt within a small screen area at larger distances
+    float pointplanedist_tolerance_pow2 = pos.z*pos.z*0.00005;
+
+    // perturb sampling origin slightly in screen-space to hide edge-ghosting artifacts where smoothing radius is quite large
+    float tc_mod = 0.5*(tc.x + tc.y); // mod(tc.x+tc.y,2)
+    tc_mod -= floor(tc_mod);
+    tc_mod *= 2.0;
+    tc += ( (tc_mod - 0.5) * kern[1].z * dlt * 0.5 );
+
+    for (int i = 1; i < 4; i++)
+    {
+        vec2 samptc = tc + kern[i].z*dlt;
+        vec3 samppos = getPosition(samptc).xyz; 
+
+        float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
+        
+        if (d*d <= pointplanedist_tolerance_pow2)
+        {
+            col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
+            defined_weight += kern[i].xy;
+        }
+    }
+
+    for (int i = 1; i < 4; i++)
+    {
+        vec2 samptc = tc - kern[i].z*dlt;
+        vec3 samppos = getPosition(samptc).xyz; 
+
+        float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
+        
+        if (d*d <= pointplanedist_tolerance_pow2)
+        {
+            col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
+            defined_weight += kern[i].xy;
+        }
+    }
+
+    col /= defined_weight.xyxx;
+    col.y *= col.y;
+    
+    frag_color = col;
 
 #ifdef IS_AMD_CARD
-	// If it's AMD make sure the GLSL compiler sees the arrays referenced once by static index. Otherwise it seems to optimise the storage awawy which leads to unfun crashes and artifacts.
-	vec3 dummy1 = kern[0];
-	vec3 dummy2 = kern[3];
+    // If it's AMD make sure the GLSL compiler sees the arrays referenced once by static index. Otherwise it seems to optimise the storage awawy which leads to unfun crashes and artifacts.
+    vec3 dummy1 = kern[0];
+    vec3 dummy2 = kern[3];
 #endif
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl b/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl
index 58fb01d200..b5677a07ee 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl
@@ -22,6 +22,8 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
+
+/*[EXTRA_CODE_HERE]*/
  
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
@@ -40,11 +42,7 @@ VARYING vec3 vary_mat2;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/cloudShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/cloudShadowF.glsl
new file mode 100644
index 0000000000..0157d166e0
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/cloudShadowF.glsl
@@ -0,0 +1,127 @@
+/** 
+ * @file class3/deferred/cloudsF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform sampler2D diffuseMap;
+
+VARYING vec4 pos;
+VARYING float target_pos_x;
+VARYING float vary_CloudDensity;
+VARYING vec2 vary_texcoord0;
+VARYING vec2 vary_texcoord1;
+VARYING vec2 vary_texcoord2;
+VARYING vec2 vary_texcoord3;
+
+uniform sampler2D cloud_noise_texture;
+uniform sampler2D cloud_noise_texture_next;
+uniform float blend_factor;
+uniform vec4 cloud_pos_density1;
+uniform vec4 cloud_pos_density2;
+uniform vec4 sunlight_color;
+uniform vec4 cloud_color;
+uniform float cloud_shadow;
+uniform float cloud_scale;
+uniform float cloud_variance;
+uniform vec3 camPosLocal;
+uniform vec3 sun_dir;
+uniform float sun_size;
+uniform float far_z;
+
+#if !defined(DEPTH_CLAMP)
+VARYING vec4 post_pos;
+#endif
+
+vec4 cloudNoise(vec2 uv)
+{
+   vec4 a = texture2D(cloud_noise_texture, uv);
+   vec4 b = texture2D(cloud_noise_texture_next, uv);
+   vec4 cloud_noise_sample = mix(a, b, blend_factor);
+   return normalize(cloud_noise_sample);
+}
+
+void main()
+{
+    // Set variables
+    vec2 uv1 = vary_texcoord0.xy;
+    vec2 uv2 = vary_texcoord1.xy;
+    vec2 uv3 = vary_texcoord2.xy;
+    float cloudDensity = 2.0 * (cloud_shadow - 0.25);
+
+    if (cloud_scale >= 0.0001)
+    {
+        vec2 uv4 = vary_texcoord3.xy;
+    
+        vec2 disturbance  = vec2(cloudNoise(uv1 / 8.0f).x, cloudNoise((uv3 + uv1) / 16.0f).x) * cloud_variance * (1.0f - cloud_scale * 0.25f);
+        vec2 disturbance2 = vec2(cloudNoise((uv1 + uv3) / 4.0f).x, cloudNoise((uv4 + uv2) / 8.0f).x) * cloud_variance * (1.0f - cloud_scale * 0.25f);
+    
+        // Offset texture coords
+        uv1 += cloud_pos_density1.xy + (disturbance * 0.2);    //large texture, visible density
+        uv2 += cloud_pos_density1.xy;   //large texture, self shadow
+        uv3 += cloud_pos_density2.xy;   //small texture, visible density
+        uv4 += cloud_pos_density2.xy;   //small texture, self shadow
+    
+        float density_variance = min(1.0, (disturbance.x* 2.0 + disturbance.y* 2.0 + disturbance2.x + disturbance2.y) * 4.0);
+    
+        cloudDensity *= 1.0 - (density_variance * density_variance);
+    
+        // Compute alpha1, the main cloud opacity
+        float alpha1 = (cloudNoise(uv1).x - 0.5) + (cloudNoise(uv3).x - 0.5) * cloud_pos_density2.z;
+        alpha1 = min(max(alpha1 + cloudDensity, 0.) * 10 * cloud_pos_density1.z, 1.);
+    
+        // And smooth
+        alpha1 = 1. - alpha1 * alpha1;
+        alpha1 = 1. - alpha1 * alpha1;  
+    
+        if (alpha1 < 0.001f)
+        {
+            discard;
+        }
+    
+        // Compute alpha2, for self shadowing effect
+        // (1 - alpha2) will later be used as percentage of incoming sunlight
+        float alpha2 = (cloudNoise(uv2).x - 0.5);
+        alpha2 = min(max(alpha2 + cloudDensity, 0.) * 2.5 * cloud_pos_density1.z, 1.);
+    
+        // And smooth
+        alpha2 = 1. - alpha2;
+        alpha2 = 1. - alpha2 * alpha2;  
+    
+        frag_color = vec4(alpha1, alpha1, alpha1, 1);
+    }
+    else
+    {
+        frag_color = vec4(1);
+    }
+
+#if !defined(DEPTH_CLAMP)
+    gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
+#endif
+
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/cloudShadowV.glsl b/indra/newview/app_settings/shaders/class1/deferred/cloudShadowV.glsl
new file mode 100644
index 0000000000..effb070f93
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/cloudShadowV.glsl
@@ -0,0 +1,63 @@
+/** 
+ * @file cloudShadowV.glsl
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_projection_matrix;
+uniform float shadow_target_width;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec4 diffuse_color;
+ATTRIBUTE vec2 texcoord0;
+
+#if !defined(DEPTH_CLAMP)
+VARYING float pos_zd2;
+#endif
+
+VARYING vec4 pos;
+VARYING float target_pos_x;
+VARYING vec2 vary_texcoord0;
+VARYING vec4 vertex_color;
+
+void passTextureIndex();
+
+void main()
+{
+	//transform vertex
+	vec4 pre_pos = vec4(position.xyz, 1.0);
+	pos = modelview_projection_matrix * pre_pos;
+	target_pos_x = 0.5 * (shadow_target_width - 1.0) * pos.x;
+
+#if !defined(DEPTH_CLAMP)
+	pos_zd2 = pos.z * 0.5;
+	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
+#else
+	gl_Position = pos;
+#endif
+	
+	passTextureIndex();
+
+	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+	vertex_color = diffuse_color;
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl b/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
index 1d8ca04ccd..ae1ac5de7f 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file WLCloudsF.glsl
+ * @file class1\deferred\cloudsF.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -22,7 +22,7 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
+/*[EXTRA_CODE_HERE]*/ 
 
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
@@ -39,69 +39,93 @@ VARYING vec4 vary_CloudColorAmbient;
 VARYING float vary_CloudDensity;
 
 uniform sampler2D cloud_noise_texture;
+uniform sampler2D cloud_noise_texture_next;
+uniform float blend_factor;
 uniform vec4 cloud_pos_density1;
 uniform vec4 cloud_pos_density2;
-uniform vec4 gamma;
+uniform float cloud_scale;
+uniform float cloud_variance;
 
 VARYING vec2 vary_texcoord0;
 VARYING vec2 vary_texcoord1;
 VARYING vec2 vary_texcoord2;
 VARYING vec2 vary_texcoord3;
+VARYING float altitude_blend_factor;
 
 /// Soft clips the light with a gamma correction
-vec3 scaleSoftClip(vec3 light) {
-	//soft clip effect:
-	light = 1. - clamp(light, vec3(0.), vec3(1.));
-	light = 1. - pow(light, gamma.xxx);
+vec3 scaleSoftClip(vec3 light);
 
-	return light;
+vec4 cloudNoise(vec2 uv)
+{
+   vec4 a = texture2D(cloud_noise_texture, uv);
+   vec4 b = texture2D(cloud_noise_texture_next, uv);
+   vec4 cloud_noise_sample = mix(a, b, blend_factor);
+   return cloud_noise_sample;
 }
 
 void main()
 {
-	// Set variables
-	vec2 uv1 = vary_texcoord0.xy;
-	vec2 uv2 = vary_texcoord1.xy;
-
-	vec4 cloudColorSun = vary_CloudColorSun;
-	vec4 cloudColorAmbient = vary_CloudColorAmbient;
-	float cloudDensity = vary_CloudDensity;
-	vec2 uv3 = vary_texcoord2.xy;
-	vec2 uv4 = vary_texcoord3.xy;
-
-	// Offset texture coords
-	uv1 += cloud_pos_density1.xy;	//large texture, visible density
-	uv2 += cloud_pos_density1.xy;	//large texture, self shadow
-	uv3 += cloud_pos_density2.xy;	//small texture, visible density
-	uv4 += cloud_pos_density2.xy;	//small texture, self shadow
-
-
-	// Compute alpha1, the main cloud opacity
-	float alpha1 = (texture2D(cloud_noise_texture, uv1).x - 0.5) + (texture2D(cloud_noise_texture, uv3).x - 0.5) * cloud_pos_density2.z;
-	alpha1 = min(max(alpha1 + cloudDensity, 0.) * 10. * cloud_pos_density1.z, 1.);
-
-	// And smooth
-	alpha1 = 1. - alpha1 * alpha1;
-	alpha1 = 1. - alpha1 * alpha1;	
-
-
-	// Compute alpha2, for self shadowing effect
-	// (1 - alpha2) will later be used as percentage of incoming sunlight
-	float alpha2 = (texture2D(cloud_noise_texture, uv2).x - 0.5);
-	alpha2 = min(max(alpha2 + cloudDensity, 0.) * 2.5 * cloud_pos_density1.z, 1.);
-
-	// And smooth
-	alpha2 = 1. - alpha2;
-	alpha2 = 1. - alpha2 * alpha2;	
-
-	// Combine
-	vec4 color;
-	color = (cloudColorSun*(1.-alpha2) + cloudColorAmbient);
-	color *= 2.;
-
-	/// Gamma correct for WL (soft clip effect).
-	frag_data[0] = vec4(scaleSoftClip(color.rgb), alpha1);
-	frag_data[1] = vec4(0.0,0.0,0.0,0.0);
-	frag_data[2] = vec4(0,0,1,0);
+    // Set variables
+    vec2 uv1 = vary_texcoord0.xy;
+    vec2 uv2 = vary_texcoord1.xy;
+
+    vec4 cloudColorSun = vary_CloudColorSun;
+    vec4 cloudColorAmbient = vary_CloudColorAmbient;
+    float cloudDensity = vary_CloudDensity;
+    vec2 uv3 = vary_texcoord2.xy;
+    vec2 uv4 = vary_texcoord3.xy;
+
+    if (cloud_scale < 0.001)
+    {
+        discard;
+    }
+
+    vec2 disturbance  = vec2(cloudNoise(uv1 / 8.0f).x, cloudNoise((uv3 + uv1) / 16.0f).x) * cloud_variance * (1.0f - cloud_scale * 0.25f);
+    vec2 disturbance2 = vec2(cloudNoise((uv1 + uv3) / 4.0f).x, cloudNoise((uv4 + uv2) / 8.0f).x) * cloud_variance * (1.0f - cloud_scale * 0.25f);
+
+    // Offset texture coords
+    uv1 += cloud_pos_density1.xy + (disturbance * 0.2);    //large texture, visible density
+    uv2 += cloud_pos_density1.xy;   //large texture, self shadow
+    uv3 += cloud_pos_density2.xy;   //small texture, visible density
+    uv4 += cloud_pos_density2.xy;   //small texture, self shadow
+
+    float density_variance = min(1.0, (disturbance.x* 2.0 + disturbance.y* 2.0 + disturbance2.x + disturbance2.y) * 4.0);
+
+    cloudDensity *= 1.0 - (density_variance * density_variance);
+
+    // Compute alpha1, the main cloud opacity
+
+    float alpha1 = (cloudNoise(uv1).x - 0.5) + (cloudNoise(uv3).x - 0.5) * cloud_pos_density2.z;
+    alpha1 = min(max(alpha1 + cloudDensity, 0.) * 10 * cloud_pos_density1.z, 1.);
+
+    // And smooth
+    alpha1 = 1. - alpha1 * alpha1;
+    alpha1 = 1. - alpha1 * alpha1;  
+
+    alpha1 *= altitude_blend_factor;
+    alpha1 = clamp(alpha1, 0.0, 1.0);
+
+    // Compute alpha2, for self shadowing effect
+    // (1 - alpha2) will later be used as percentage of incoming sunlight
+    float alpha2 = (cloudNoise(uv2).x - 0.5);
+    alpha2 = min(max(alpha2 + cloudDensity, 0.) * 2.5 * cloud_pos_density1.z, 1.);
+
+    // And smooth
+    alpha2 = 1. - alpha2;
+    alpha2 = 1. - alpha2 * alpha2;  
+
+    // Combine
+    vec4 color;
+    color = (cloudColorSun*(1.-alpha2) + cloudColorAmbient);
+    color.rgb= max(vec3(0), color.rgb);
+    color.rgb *= 2.0;
+    color.rgb = scaleSoftClip(color.rgb);
+
+    /// Gamma correct for WL (soft clip effect).
+    frag_data[0] = vec4(color.rgb, alpha1);
+    frag_data[1] = vec4(0.0,0.0,0.0,0.0);
+    frag_data[2] = vec4(0,0,0,1);
+
+    gl_FragDepth = 0.99995f;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl b/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl
index 17f425475c..caa4fe1f65 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/cloudsV.glsl
@@ -41,13 +41,16 @@ VARYING vec2 vary_texcoord0;
 VARYING vec2 vary_texcoord1;
 VARYING vec2 vary_texcoord2;
 VARYING vec2 vary_texcoord3;
+VARYING float altitude_blend_factor;
 
 // Inputs
 uniform vec3 camPosLocal;
 
 uniform vec4 lightnorm;
 uniform vec4 sunlight_color;
-uniform vec4 ambient;
+uniform vec4 moonlight_color;
+uniform int sun_up_factor;
+uniform vec4 ambient_color;
 uniform vec4 blue_horizon;
 uniform vec4 blue_density;
 uniform float haze_horizon;
@@ -58,22 +61,40 @@ uniform float density_multiplier;
 uniform float max_y;
 
 uniform vec4 glow;
+uniform float sun_moon_glow_factor;
 
 uniform vec4 cloud_color;
 
 uniform float cloud_scale;
 
+// NOTE: Keep these in sync!
+//       indra\newview\app_settings\shaders\class1\deferred\skyV.glsl
+//       indra\newview\app_settings\shaders\class1\deferred\cloudsV.glsl
+//       indra\newview\lllegacyatmospherics.cpp
 void main()
 {
 
 	// World / view / projection
 	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
 
+	// Texture coords
 	vary_texcoord0 = texcoord0;
+	vary_texcoord0.xy -= 0.5;
+	vary_texcoord0.xy /= cloud_scale;
+	vary_texcoord0.xy += 0.5;
+
+	vary_texcoord1 = vary_texcoord0;
+	vary_texcoord1.x += lightnorm.x * 0.0125;
+	vary_texcoord1.y += lightnorm.z * 0.0125;
+
+	vary_texcoord2 = vary_texcoord0 * 16.;
+	vary_texcoord3 = vary_texcoord1 * 16.;
 
 	// Get relative position
 	vec3 P = position.xyz - camPosLocal.xyz + vec3(0,50,0);
 
+    altitude_blend_factor = clamp((P.y + 512.0) / max_y, 0.0, 1.0);
+
 	// Set altitude
 	if (P.y > 0.)
 	{
@@ -81,6 +102,7 @@ void main()
 	}
 	else
 	{
+		altitude_blend_factor = 0; // SL-11589 Fix clouds drooping below horizon
 		P *= (-32000. / P.y);
 	}
 
@@ -93,16 +115,18 @@ void main()
 	vec4 temp2 = vec4(0.);
 	vec4 blue_weight;
 	vec4 haze_weight;
+	//vec4 sunlight = (sun_up_factor == 1) ? sunlight_color : moonlight_color;
 	vec4 sunlight = sunlight_color;
 	vec4 light_atten;
 
+    float dens_mul = density_multiplier;
 
 	// Sunlight attenuation effect (hue and brightness) due to atmosphere
 	// this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (dens_mul * max_y);
 
 	// Calculate relative weights
-	temp1 = blue_density + haze_density;
+	temp1 = abs(blue_density) + vec4(abs(haze_density));
 	blue_weight = blue_density / temp1;
 	haze_weight = haze_density / temp1;
 
@@ -112,7 +136,7 @@ void main()
 	sunlight *= exp( - light_atten * temp2.y);
 
 	// Distance
-	temp2.z = Plen * density_multiplier;
+	temp2.z = Plen * dens_mul;
 
 	// Transparency (-> temp1)
 	// ATI Bugfix -- can't store temp1*temp2.z in a variable because the ati
@@ -131,11 +155,13 @@ void main()
 	temp2.x = pow(temp2.x, glow.z);
 		// glow.z should be negative, so we're doing a sort of (1 / "angle") function
 
+    temp2.x *= sun_moon_glow_factor;
+
 	// Add "minimum anti-solar illumination"
 	temp2.x += .25;
 
 	// Increase ambient when there are more clouds
-	vec4 tmpAmbient = ambient;
+	vec4 tmpAmbient = ambient_color;
 	tmpAmbient += (1. - tmpAmbient) * cloud_shadow * 0.5; 
 
 	// Dim sunlight by cloud shadow percentage
@@ -147,8 +173,6 @@ void main()
 			 );	
 
 	// CLOUDS
-
-	sunlight = sunlight_color;
 	temp2.y = max(0., lightnorm.y * 2.);
 	temp2.y = 1. / temp2.y;
 	sunlight *= exp( - light_atten * temp2.y);
@@ -167,19 +191,6 @@ void main()
 	vary_CloudDensity = 2. * (cloud_shadow - 0.25);
 
 
-	// Texture coords
-	vary_texcoord0 = texcoord0;
-	vary_texcoord0.xy -= 0.5;
-	vary_texcoord0.xy /= cloud_scale;
-	vary_texcoord0.xy += 0.5;
-
-	vary_texcoord1 = vary_texcoord0;
-	vary_texcoord1.x += lightnorm.x * 0.0125;
-	vary_texcoord1.y += lightnorm.z * 0.0125;
-
-	vary_texcoord2 = vary_texcoord0 * 16.;
-	vary_texcoord3 = vary_texcoord1 * 16.;
-
 	// Combine these to minimize register use
 	vary_CloudColorAmbient += oHazeColorBelowCloud;
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl b/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl
index fef1c5a584..079d8458c9 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl
@@ -50,15 +50,6 @@ uniform vec2 screen_res;
 
 VARYING vec2 vary_fragcoord;
 
-float getDepth(vec2 pos_screen)
-{
-	float z = texture2DRect(depthMap, pos_screen.xy).r;
-	z = z*2.0-1.0;
-	vec4 ndc = vec4(0.0, 0.0, z, 1.0);
-	vec4 p = inv_proj*ndc;
-	return p.z/p.w;
-}
-
 float calc_cof(float depth)
 {
 	float sc = (depth-focal_distance)/-depth*blur_constant;
@@ -77,8 +68,12 @@ float calc_cof(float depth)
 void main() 
 {
 	vec2 tc = vary_fragcoord.xy;
-	
-	float depth = getDepth(tc);
+
+    float z = texture2DRect(depthMap, tc).r;
+	z = z*2.0-1.0;
+	vec4 ndc = vec4(0.0, 0.0, z, 1.0);
+	vec4 p = inv_proj*ndc;
+	float depth = p.z/p.w;
 	
 	vec4 diff = texture2DRect(diffuseRect, vary_fragcoord.xy);
 	
diff --git a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
new file mode 100644
index 0000000000..e27bbce094
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
@@ -0,0 +1,79 @@
+/** 
+ * @file class1/deferred/deferredUtil.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform sampler2DRect   normalMap;
+uniform sampler2DRect   depthMap;
+
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+
+vec2 getScreenCoordinate(vec2 screenpos)
+{
+    vec2 sc = screenpos.xy * 2.0;
+    if (screen_res.x > 0 && screen_res.y > 0)
+    {
+       sc /= screen_res;
+    }
+    return sc - vec2(1.0, 1.0);
+}
+
+vec3 getNorm(vec2 screenpos)
+{
+   vec2 enc = texture2DRect(normalMap, screenpos.xy).xy;
+   vec2 fenc = enc*4-2;
+   float f = dot(fenc,fenc);
+   float g = sqrt(1-f/4);
+   vec3 n;
+   n.xy = fenc*g;
+   n.z = 1-f/2;
+   return n;
+}
+
+float getDepth(vec2 pos_screen)
+{
+    float depth = texture2DRect(depthMap, pos_screen).r;
+    return depth;
+}
+
+vec4 getPosition(vec2 pos_screen)
+{
+    float depth = getDepth(pos_screen);
+    vec2 sc = getScreenCoordinate(pos_screen);
+    vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
+    vec4 pos = inv_proj * ndc;
+    pos /= pos.w;
+    pos.w = 1.0;
+    return pos;
+}
+
+vec4 getPositionWithDepth(vec2 pos_screen, float depth)
+{
+    vec2 sc = getScreenCoordinate(pos_screen);
+    vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
+    vec4 pos = inv_proj * ndc;
+    pos /= pos.w;
+    pos.w = 1.0;
+    return pos;
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskF.glsl
index 7930b5d18b..b328ee9483 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -37,11 +39,7 @@ VARYING vec3 vary_normal;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl
index 8525e13333..fc5c86b4d6 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -36,11 +38,7 @@ uniform float minimum_alpha;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskNoColorF.glsl b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskNoColorF.glsl
index 37d70a2412..1bb8eb8bd0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskNoColorF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskNoColorF.glsl
@@ -23,6 +23,7 @@
  * $/LicenseInfo$
  */
  
+/*[EXTRA_CODE_HERE]*/
 
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
@@ -37,11 +38,7 @@ uniform sampler2D diffuseMap;
 VARYING vec3 vary_normal;
 VARYING vec2 vary_texcoord0;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/diffuseF.glsl b/indra/newview/app_settings/shaders/class1/deferred/diffuseF.glsl
index 6befb1bd8b..8319e61242 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/diffuseF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/diffuseF.glsl
@@ -22,6 +22,8 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
+
+/*[EXTRA_CODE_HERE]*/
  
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
@@ -35,11 +37,7 @@ VARYING vec3 vary_normal;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/diffuseIndexedF.glsl b/indra/newview/app_settings/shaders/class1/deferred/diffuseIndexedF.glsl
index adc361d7a2..ccd1df84f9 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/diffuseIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/diffuseIndexedF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -33,17 +35,13 @@ VARYING vec3 vary_normal;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
+vec2 encode_normal(vec3 n);
+vec3 linear_to_srgb(vec3 c);
 
 void main() 
 {
 	vec3 col = vertex_color.rgb * diffuseLookup(vary_texcoord0.xy).rgb;
-	
+
 	vec3 spec;
 	spec.rgb = vec3(vertex_color.a);
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/emissiveF.glsl b/indra/newview/app_settings/shaders/class1/deferred/emissiveF.glsl
index 0ffca8515c..f0522850de 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/emissiveF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/emissiveF.glsl
@@ -44,7 +44,6 @@ void main()
 	float shadow = 1.0;
 
 	vec4 color = diffuseLookup(vary_texcoord0.xy)*vertex_color;
-	color.rgb = pow(color.rgb, vec3(2.2));
 	color.rgb = fullbrightAtmosTransport(color.rgb);
 
 	color.rgb = fullbrightScaleSoftClip(color.rgb);
diff --git a/indra/newview/app_settings/shaders/class1/deferred/emissiveV.glsl b/indra/newview/app_settings/shaders/class1/deferred/emissiveV.glsl
index 115b04797f..5e4f08b017 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/emissiveV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/emissiveV.glsl
@@ -34,11 +34,8 @@ ATTRIBUTE vec2 texcoord0;
 
 void calcAtmospherics(vec3 inPositionEye);
 
-vec3 atmosAmbient(vec3 light);
+vec3 atmosAmbient();
 vec3 atmosAffectDirectionalLight(float lightIntensity);
-vec3 scaleDownLight(vec3 light);
-vec3 scaleUpLight(vec3 light);
-
 
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index 756e625d07..57420158ca 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file fullbrightF.glsl
+ * @file deferred/fullbrightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -33,7 +33,7 @@ out vec4 frag_color;
 #define frag_color gl_FragColor
 #endif
 
-#if !HAS_DIFFUSE_LOOKUP
+#if !defined(HAS_DIFFUSE_LOOKUP)
 uniform sampler2D diffuseMap;
 #endif
 
@@ -41,108 +41,22 @@ VARYING vec3 vary_position;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
+#ifdef WATER_FOG
+vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-}
-
-vec3 fullbrightAtmosTransportDeferred(vec3 light)
-{
-	return light;
-}
-
-vec3 fullbrightScaleSoftClipDeferred(vec3 light)
-{
-	//soft clip effect:
-	return light;
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
+vec3 fullbrightAtmosTransport(vec3 light);
+vec3 fullbrightScaleSoftClip(vec3 light);
 
 #ifdef HAS_ALPHA_MASK
 uniform float minimum_alpha;
 #endif
 
-#ifdef WATER_FOG
-uniform vec4 waterPlane;
-uniform vec4 waterFogColor;
-uniform float waterFogDensity;
-uniform float waterFogKS;
-
-vec4 applyWaterFogDeferred(vec3 pos, vec4 color)
-{
-	//normalize view vector
-	vec3 view = normalize(pos);
-	float es = -(dot(view, waterPlane.xyz));
-
-	//find intersection point with water plane and eye vector
-	
-	//get eye depth
-	float e0 = max(-waterPlane.w, 0.0);
-	
-	vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
-	
-	//get object depth
-	float depth = length(pos - int_v);
-		
-	//get "thickness" of water
-	float l = max(depth, 0.1);
-
-	float kd = waterFogDensity;
-	float ks = waterFogKS;
-	vec4 kc = waterFogColor;
-	
-	float F = 0.98;
-	
-	float t1 = -kd * pow(F, ks * e0);
-	float t2 = kd + ks * es;
-	float t3 = pow(F, t2*l) - 1.0;
-	
-	float L = min(t1/t2*t3, 1.0);
-	
-	float D = pow(0.98, l*kd);
-	
-	color.rgb = color.rgb * D + kc.rgb * L;
-	color.a = kc.a + color.a;
-	
-	return color;
-}
-#endif
-
 void main() 
 {
-#if HAS_DIFFUSE_LOOKUP
+#ifdef HAS_DIFFUSE_LOOKUP
 	vec4 color = diffuseLookup(vary_texcoord0.xy);
 #else
 	vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
@@ -158,19 +72,14 @@ void main()
 #endif
 
 	color.rgb *= vertex_color.rgb;
-	color.rgb = srgb_to_linear(color.rgb);
-	color.rgb = fullbrightAtmosTransportDeferred(color.rgb);
-	color.rgb = fullbrightScaleSoftClipDeferred(color.rgb);
-	
-	color.rgb = linear_to_srgb(color.rgb);
 
 #ifdef WATER_FOG
 	vec3 pos = vary_position;
-	vec4 fogged = applyWaterFogDeferred(pos, vec4(color.rgb, final_alpha));
+	vec4 fogged = applyWaterFogView(pos, vec4(color.rgb, final_alpha));
 	color.rgb = fogged.rgb;
 	color.a   = fogged.a;
 #else
-	color.a   = final_alpha;
+    color.a   = final_alpha;
 #endif
 
 	frag_color.rgb = color.rgb;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyF.glsl
index b0db9876d3..bd0ad3bce8 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyF.glsl
@@ -23,7 +23,7 @@
  * $/LicenseInfo$
  */
  
-
+/*[EXTRA_CODE_HERE]*/
 
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
@@ -31,41 +31,57 @@ out vec4 frag_color;
 #define frag_color gl_FragColor
 #endif
 
-#ifndef diffuseLookup
+#ifndef HAS_DIFFUSE_LOOKUP
 uniform sampler2D diffuseMap;
 #endif
 
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 VARYING vec3 vary_texcoord1;
+VARYING vec4 vary_position;
 
 uniform samplerCube environmentMap;
 
 vec3 fullbrightShinyAtmosTransport(vec3 light);
+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
 vec3 fullbrightScaleSoftClip(vec3 light);
 
+void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao);
+
+vec3 linear_to_srgb(vec3 c);
+vec3 srgb_to_linear(vec3 c);
+
+
 void main()
 {
-#if HAS_DIFFUSE_LOOKUP
+#ifdef HAS_DIFFUSE_LOOKUP
 	vec4 color = diffuseLookup(vary_texcoord0.xy);
 #else
 	vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
 #endif
-
 	
 	color.rgb *= vertex_color.rgb;
+	vec3 pos = vary_position.xyz/vary_position.w;
+
+	vec3 sunlit;
+	vec3 amblit;
+	vec3 additive;
+	vec3 atten;
+
+	calcAtmosphericVars(pos.xyz, vec3(0), 1.0, sunlit, amblit, additive, atten, false);
 	
 	vec3 envColor = textureCube(environmentMap, vary_texcoord1.xyz).rgb;	
-	color.rgb = mix(color.rgb, envColor.rgb, vertex_color.a);
+	float env_intensity = vertex_color.a;
+	color.rgb = mix(color.rgb, envColor.rgb, env_intensity);
 
-	color.rgb = pow(color.rgb,vec3(2.2f,2.2f,2.2f));
+	//color.rgb = srgb_to_linear(color.rgb);
 	
-	color.rgb = fullbrightShinyAtmosTransport(color.rgb);
+	color.rgb = fullbrightAtmosTransportFrag(color.rgb, additive, atten);
 	color.rgb = fullbrightScaleSoftClip(color.rgb);
 
 	color.a = 1.0;
 
-	color.rgb = pow(color.rgb, vec3(1.0/2.2));
+	//color.rgb = linear_to_srgb(color.rgb);
 
 	frag_color = color;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyV.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyV.glsl
index 34bd8d445a..8f6eb79668 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightShinyV.glsl
@@ -45,7 +45,7 @@ ATTRIBUTE vec2 texcoord0;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 VARYING vec3 vary_texcoord1;
-
+VARYING vec4 vary_position;
 
 void main()
 {
@@ -53,7 +53,7 @@ void main()
 	vec4 vert = vec4(position.xyz,1.0);
 	passTextureIndex();
 	vec4 pos = (modelview_matrix * vert);
-	gl_Position = modelview_projection_matrix*vec4(position.xyz, 1.0);
+	vary_position = gl_Position = modelview_projection_matrix*vec4(position.xyz, 1.0);
 	
 	vec3 norm = normalize(normal_matrix * normal);
 	vec3 ref = reflect(pos.xyz, -norm);
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl
index 8e899e3e0f..bdf3546aa5 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl
@@ -35,10 +35,8 @@ ATTRIBUTE vec2 texcoord0;
 
 void calcAtmospherics(vec3 inPositionEye);
 
-vec3 atmosAmbient(vec3 light);
+vec3 atmosAmbient();
 vec3 atmosAffectDirectionalLight(float lightIntensity);
-vec3 scaleDownLight(vec3 light);
-vec3 scaleUpLight(vec3 light);
 
 #ifdef WATER_FOG
 VARYING vec3 vary_position;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
index f8fdde43f9..d29e8a9423 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -38,42 +40,6 @@ uniform sampler2D specularMap;
 
 VARYING vec2 vary_texcoord0;
 
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
 void main() 
 {
 	vec4 col = texture2D(diffuseMap, vary_texcoord0.xy);
@@ -86,8 +52,6 @@ void main()
 	vec4 norm = texture2D(normalMap,   vary_texcoord0.xy);
 	vec4 spec = texture2D(specularMap, vary_texcoord0.xy);
 
-	col.rgb = linear_to_srgb(col.rgb);
-
 	frag_data[0] = vec4(col.rgb, 0.0);
 	frag_data[1] = spec;
 	frag_data[2] = vec4(norm.xy,0,0);
diff --git a/indra/newview/app_settings/shaders/class1/deferred/srgb.glsl b/indra/newview/app_settings/shaders/class1/deferred/indirect.glsl
index 587f3d5a94..49bfa660f8 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/srgb.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/indirect.glsl
@@ -1,7 +1,7 @@
 /** 
- * @file srgb.glsl
+ * @file class1/deferred/indirect.glsl
  *
- * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * $LicenseInfo:firstyear=2018&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2007, Linden Research, Inc.
  * 
@@ -23,24 +23,8 @@
  * $/LicenseInfo$
  */
 
-vec3 srgb_to_linear(vec3 cs)
+vec3 getIndirect(vec3 ambient, vec3 norm, vec3 pos, vec2 pos_screen)
 {
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-	return mix(high_range, low_range, lte);
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-	return mix(high_range, low_range, lt);
-
+    return ambient;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl b/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl
index dcf474824d..be1003a7e0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl
@@ -22,8 +22,8 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
-uniform sampler2DRect diffuseMap;
+
+/*[EXTRA_CODE_HERE]*/
 
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
@@ -31,6 +31,7 @@ out vec4 frag_color;
 #define frag_color gl_FragColor
 #endif
 
+uniform sampler2DRect diffuseMap;
 VARYING vec2 vary_fragcoord;
 
 void main() 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index 07d28ed4cd..0afd1a9672 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -1,788 +1,439 @@
-/** 
- * @file materialF.glsl
- *
- * $LicenseInfo:firstyear=2007&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2007, Linden Research, Inc.
- * 
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License only.
- * 
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- * 
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
- * $/LicenseInfo$
- */
- 
-#define DIFFUSE_ALPHA_MODE_IGNORE	0
-#define DIFFUSE_ALPHA_MODE_BLEND	1
-#define DIFFUSE_ALPHA_MODE_MASK		2
-#define DIFFUSE_ALPHA_MODE_EMISSIVE 3
-
-uniform float emissive_brightness;
-uniform float display_gamma;
-
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
-#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
-
-#ifdef DEFINE_GL_FRAGCOLOR
-out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
-
-#if HAS_SUN_SHADOW
-
-uniform sampler2DShadow shadowMap0;
-uniform sampler2DShadow shadowMap1;
-uniform sampler2DShadow shadowMap2;
-uniform sampler2DShadow shadowMap3;
-
-uniform mat4 shadow_matrix[6];
-uniform vec4 shadow_clip;
-uniform vec2 shadow_res;
-uniform float shadow_bias;
-
-float pcfShadow(sampler2DShadow shadowMap, vec4 stc)
-{
-	stc.xyz /= stc.w;
-	stc.z += shadow_bias;
-		
-	stc.x = floor(stc.x*shadow_res.x + fract(stc.y*shadow_res.y*12345))/shadow_res.x; // add some chaotic jitter to X sample pos according to Y to disguise the snapping going on here
-	
-	float cs = shadow2D(shadowMap, stc.xyz).x;
-	float shadow = cs;
-	
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(2.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(1.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(-1.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
-    shadow += shadow2D(shadowMap, stc.xyz+vec3(-2.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
-                       
-    return shadow*0.2;
-}
-
-#endif
-
-uniform samplerCube environmentMap;
-uniform sampler2D	  lightFunc;
-
-// Inputs
-uniform vec4 morphFactor;
-uniform vec3 camPosLocal;
-//uniform vec4 camPosWorld;
-uniform vec4 gamma;
-uniform vec4 lightnorm;
-uniform vec4 sunlight_color;
-uniform vec4 ambient;
-uniform vec4 blue_horizon;
-uniform vec4 blue_density;
-uniform float haze_horizon;
-uniform float haze_density;
-uniform float cloud_shadow;
-uniform float density_multiplier;
-uniform float distance_multiplier;
-uniform float max_y;
-uniform vec4 glow;
-uniform float scene_light_strength;
-uniform mat3 env_mat;
-uniform mat3 ssao_effect_mat;
-
-uniform vec3 sun_dir;
-VARYING vec2 vary_fragcoord;
-
-VARYING vec3 vary_position;
-
-vec3 vary_PositionEye;
-
-vec3 vary_SunlitColor;
-vec3 vary_AmblitColor;
-vec3 vary_AdditiveColor;
-vec3 vary_AtmosAttenuation;
-
-uniform mat4 inv_proj;
-uniform vec2 screen_res;
-
-uniform vec4 light_position[8];
-uniform vec3 light_direction[8];
-uniform vec3 light_attenuation[8]; 
-uniform vec3 light_diffuse[8];
-
-#ifdef WATER_FOG
-uniform vec4 waterPlane;
-uniform vec4 waterFogColor;
-uniform float waterFogDensity;
-uniform float waterFogKS;
-
-vec4 applyWaterFogDeferred(vec3 pos, vec4 color)
-{
-	//normalize view vector
-	vec3 view = normalize(pos);
-	float es = -(dot(view, waterPlane.xyz));
-
-	//find intersection point with water plane and eye vector
-	
-	//get eye depth
-	float e0 = max(-waterPlane.w, 0.0);
-	
-	vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
-	
-	//get object depth
-	float depth = length(pos - int_v);
-		
-	//get "thickness" of water
-	float l = max(depth, 0.1);
-
-	float kd = waterFogDensity;
-	float ks = waterFogKS;
-	vec4 kc = waterFogColor;
-	
-	float F = 0.98;
-	
-	float t1 = -kd * pow(F, ks * e0);
-	float t2 = kd + ks * es;
-	float t3 = pow(F, t2*l) - 1.0;
-	
-	float L = min(t1/t2*t3, 1.0);
-	
-	float D = pow(0.98, l*kd);
-	
-	color.rgb = color.rgb * D + kc.rgb * L;
-	color.a = kc.a + color.a;
-	
-	return color;
-}
-#endif
-
-vec3 calcDirectionalLight(vec3 n, vec3 l)
-{
-	float a = max(dot(n,l),0.0);
-	return vec3(a,a,a);
-}
-
-
-vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spec, vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight, inout float glare)
-{
-	//get light vector
-	vec3 lv = lp.xyz-v;
-	
-	//get distance
-	float d = length(lv);
-	
-	float da = 1.0;
-
-	vec3 col = vec3(0,0,0);
-
-	if (d > 0.0 && la > 0.0 && fa > 0.0)
-	{
-		//normalize light vector
-		lv = normalize(lv);
-	
-		//distance attenuation
-		float dist = d/la;
-		float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
-		dist_atten *= dist_atten;
-		dist_atten *= 2.0;
-
-		// spotlight coefficient.
-		float spot = max(dot(-ln, lv), is_pointlight);
-		da *= spot*spot; // GL_SPOT_EXPONENT=2
-
-		//angular attenuation
-		da *= max(dot(n, lv), 0.0);		
-		
-		float lit = max(da * dist_atten, 0.0);
-
-		col = light_col*lit*diffuse;
-
-		if (spec.a > 0.0)
-		{
-			//vec3 ref = dot(pos+lv, norm);
-			vec3 h = normalize(lv+npos);
-			float nh = dot(n, h);
-			float nv = dot(n, npos);
-			float vh = dot(npos, h);
-			float sa = nh;
-			float fres = pow(1 - dot(h, npos), 5)*0.4+0.5;
-
-			float gtdenom = 2 * nh;
-			float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));
-								
-			if (nh > 0.0)
-			{
-				float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
-				vec3 speccol = lit*scol*light_col.rgb*spec.rgb;
-				col += speccol;
-
-				float cur_glare = max(speccol.r, speccol.g);
-				cur_glare = max(cur_glare, speccol.b);
-				glare = max(glare, speccol.r);
-				glare += max(cur_glare, 0.0);
-				//col += spec.rgb;
-			}
-		}
-	}
-
-	return max(col, vec3(0.0,0.0,0.0));	
-
-}
-
-vec4 getPosition_d(vec2 pos_screen, float depth)
-{
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
-
-#ifndef WATER_FOG
-vec3 getPositionEye()
-{
-	return vary_PositionEye;
-}
-#endif
-
-vec3 getSunlitColor()
-{
-	return vary_SunlitColor;
-}
-vec3 getAmblitColor()
-{
-	return vary_AmblitColor;
-}
-vec3 getAdditiveColor()
-{
-	return vary_AdditiveColor;
-}
-vec3 getAtmosAttenuation()
-{
-	return vary_AtmosAttenuation;
-}
-
-void setPositionEye(vec3 v)
-{
-	vary_PositionEye = v;
-}
-
-void setSunlitColor(vec3 v)
-{
-	vary_SunlitColor = v;
-}
-
-void setAmblitColor(vec3 v)
-{
-	vary_AmblitColor = v;
-}
-
-void setAdditiveColor(vec3 v)
-{
-	vary_AdditiveColor = v;
-}
-
-void setAtmosAttenuation(vec3 v)
-{
-	vary_AtmosAttenuation = v;
-}
-
-void calcAtmospherics(vec3 inPositionEye, float ambFactor) {
-
-	vec3 P = inPositionEye;
-	setPositionEye(P);
-	
-	vec3 tmpLightnorm = lightnorm.xyz;
-
-	vec3 Pn = normalize(P);
-	float Plen = length(P);
-
-	vec4 temp1 = vec4(0);
-	vec3 temp2 = vec3(0);
-	vec4 blue_weight;
-	vec4 haze_weight;
-	vec4 sunlight = sunlight_color;
-	vec4 light_atten;
-
-	//sunlight attenuation effect (hue and brightness) due to atmosphere
-	//this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
-		//I had thought blue_density and haze_density should have equal weighting,
-		//but attenuation due to haze_density tends to seem too strong
-
-	temp1 = blue_density + vec4(haze_density);
-	blue_weight = blue_density / temp1;
-	haze_weight = vec4(haze_density) / temp1;
-
-	//(TERRAIN) compute sunlight from lightnorm only (for short rays like terrain)
-	temp2.y = max(0.0, tmpLightnorm.y);
-	temp2.y = 1. / temp2.y;
-	sunlight *= exp( - light_atten * temp2.y);
-
-	// main atmospheric scattering line integral
-	temp2.z = Plen * density_multiplier;
-
-	// Transparency (-> temp1)
-	// ATI Bugfix -- can't store temp1*temp2.z*distance_multiplier in a variable because the ati
-	// compiler gets confused.
-	temp1 = exp(-temp1 * temp2.z * distance_multiplier);
-
-	//final atmosphere attenuation factor
-	setAtmosAttenuation(temp1.rgb);
-	
-	//compute haze glow
-	//(can use temp2.x as temp because we haven't used it yet)
-	temp2.x = dot(Pn, tmpLightnorm.xyz);
-	temp2.x = 1. - temp2.x;
-		//temp2.x is 0 at the sun and increases away from sun
-	temp2.x = max(temp2.x, .03);	//was glow.y
-		//set a minimum "angle" (smaller glow.y allows tighter, brighter hotspot)
-	temp2.x *= glow.x;
-		//higher glow.x gives dimmer glow (because next step is 1 / "angle")
-	temp2.x = pow(temp2.x, glow.z);
-		//glow.z should be negative, so we're doing a sort of (1 / "angle") function
-
-	//add "minimum anti-solar illumination"
-	temp2.x += .25;
-	
-	//increase ambient when there are more clouds
-	vec4 tmpAmbient = ambient + (vec4(1.) - ambient) * cloud_shadow * 0.5;
-	
-	/*  decrease value and saturation (that in HSV, not HSL) for occluded areas
-	 * // for HSV color/geometry used here, see http://gimp-savvy.com/BOOK/index.html?node52.html
-	 * // The following line of code performs the equivalent of:
-	 * float ambAlpha = tmpAmbient.a;
-	 * float ambValue = dot(vec3(tmpAmbient), vec3(0.577)); // projection onto <1/rt(3), 1/rt(3), 1/rt(3)>, the neutral white-black axis
-	 * vec3 ambHueSat = vec3(tmpAmbient) - vec3(ambValue);
-	 * tmpAmbient = vec4(RenderSSAOEffect.valueFactor * vec3(ambValue) + RenderSSAOEffect.saturationFactor *(1.0 - ambFactor) * ambHueSat, ambAlpha);
-	 */
-	tmpAmbient = vec4(mix(ssao_effect_mat * tmpAmbient.rgb, tmpAmbient.rgb, ambFactor), tmpAmbient.a);
-
-	//haze color
-	setAdditiveColor(
-		vec3(blue_horizon * blue_weight * (sunlight*(1.-cloud_shadow) + tmpAmbient)
-	  + (haze_horizon * haze_weight) * (sunlight*(1.-cloud_shadow) * temp2.x
-		  + tmpAmbient)));
-
-	//brightness of surface both sunlight and ambient
-	setSunlitColor(vec3(sunlight * .5));
-	setAmblitColor(vec3(tmpAmbient * .25));
-	setAdditiveColor(getAdditiveColor() * vec3(1.0 - temp1));
-}
-
-vec3 atmosLighting(vec3 light)
-{
-	light *= getAtmosAttenuation().r;
-	light += getAdditiveColor();
-	return (2.0 * light);
-}
-
-vec3 atmosTransport(vec3 light) {
-	light *= getAtmosAttenuation().r;
-	light += getAdditiveColor() * 2.0;
-	return light;
-}
-vec3 atmosGetDiffuseSunlightColor()
-{
-	return getSunlitColor();
-}
-
-vec3 scaleDownLight(vec3 light)
-{
-	return (light / vec3(scene_light_strength, scene_light_strength, scene_light_strength));
-}
-
-vec3 scaleUpLight(vec3 light)
-{
-	return (light * vec3(scene_light_strength, scene_light_strength, scene_light_strength));
-}
-
-vec3 atmosAmbient(vec3 light)
-{
-	return getAmblitColor() + (light * vec3(0.5f, 0.5f, 0.5f));
-}
-
-vec3 atmosAffectDirectionalLight(float lightIntensity)
-{
-	return getSunlitColor() * vec3(lightIntensity, lightIntensity, lightIntensity);
-}
-
-vec3 scaleSoftClip(vec3 light)
-{
-	//soft clip effect:
-    vec3 zeroes = vec3(0.0f, 0.0f, 0.0f);
-    vec3 ones   = vec3(1.0f, 1.0f, 1.0f);
-
-	light = ones - clamp(light, zeroes, ones);
-	light = ones - pow(light, gamma.xxx);
-
-	return light;
-}
-
-vec3 fullbrightAtmosTransport(vec3 light) {
-	float brightness = dot(light.rgb, vec3(0.33333));
-
-	return mix(atmosTransport(light.rgb), light.rgb + getAdditiveColor().rgb, brightness * brightness);
-}
-
-vec3 fullbrightScaleSoftClip(vec3 light)
-{
-	//soft clip effect:
-	return light;
-}
-
-#else
-#ifdef DEFINE_GL_FRAGCOLOR
-out vec4 frag_data[3];
-#else
-#define frag_data gl_FragData
-#endif
-#endif
-
-uniform sampler2D diffuseMap;
-
-#if HAS_NORMAL_MAP
-uniform sampler2D bumpMap;
-#endif
-
-#if HAS_SPECULAR_MAP
-uniform sampler2D specularMap;
-
-VARYING vec2 vary_texcoord2;
-#endif
-
-uniform float env_intensity;
-uniform vec4 specular_color;  // specular color RGB and specular exponent (glossiness) in alpha
-
-#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_MASK)
-uniform float minimum_alpha;
-#endif
-
-#if HAS_NORMAL_MAP
-VARYING vec3 vary_mat0;
-VARYING vec3 vary_mat1;
-VARYING vec3 vary_mat2;
-VARYING vec2 vary_texcoord1;
-#else
-VARYING vec3 vary_normal;
-#endif
-
-VARYING vec4 vertex_color;
-VARYING vec2 vary_texcoord0;
-
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-void main() 
-{
-	vec4 diffcol = texture2D(diffuseMap, vary_texcoord0.xy);
-	diffcol.rgb *= vertex_color.rgb;
-
-#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_MASK)
-	if (diffcol.a < minimum_alpha)
-	{
-		discard;
-	}
-#endif
-
-#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
-	vec3 gamma_diff = diffcol.rgb;
-	diffcol.rgb = srgb_to_linear(diffcol.rgb);
-#endif
-
-#if HAS_SPECULAR_MAP
-	vec4 spec = texture2D(specularMap, vary_texcoord2.xy);
-	spec.rgb *= specular_color.rgb;
-#else
-	vec4 spec = vec4(specular_color.rgb, 1.0);
-#endif
-
-#if HAS_NORMAL_MAP
-	vec4 norm = texture2D(bumpMap, vary_texcoord1.xy);
-
-	norm.xyz = norm.xyz * 2 - 1;
-
-	vec3 tnorm = vec3(dot(norm.xyz,vary_mat0),
-			  dot(norm.xyz,vary_mat1),
-			  dot(norm.xyz,vary_mat2));
-#else
-	vec4 norm = vec4(0,0,0,1.0);
-	vec3 tnorm = vary_normal;
-#endif
-
-    norm.xyz = tnorm;
-    norm.xyz = normalize(norm.xyz);
-
-	vec2 abnormal	= encode_normal(norm.xyz);
-		 norm.xyz   = decode_normal(abnormal.xy);
-
-	vec4 final_color = diffcol;
-	
-#if (DIFFUSE_ALPHA_MODE != DIFFUSE_ALPHA_MODE_EMISSIVE)
-	final_color.a = emissive_brightness;
-#else
-	final_color.a = max(final_color.a, emissive_brightness);
-#endif
-
-	vec4 final_specular = spec;
-#if HAS_SPECULAR_MAP
-	vec4 final_normal = vec4(encode_normal(normalize(tnorm)), env_intensity * spec.a, 0.0);
-	final_specular.a = specular_color.a * norm.a;
-#else
-	vec4 final_normal = vec4(encode_normal(normalize(tnorm)), env_intensity, 0.0);
-	final_specular.a = specular_color.a;
-#endif
-	
-
-#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
-		//forward rendering, output just lit RGBA
-	vec3 pos = vary_position;
-
-#if HAS_SUN_SHADOW
-	float shadow = 0.0;
-	
-	vec4 spos = vec4(pos,1.0);
-		
-	if (spos.z > -shadow_clip.w)
-	{	
-		vec4 lpos;
-		
-		vec4 near_split = shadow_clip*-0.75;
-		vec4 far_split = shadow_clip*-1.25;
-		vec4 transition_domain = near_split-far_split;
-		float weight = 0.0;
-
-		if (spos.z < near_split.z)
-		{
-			lpos = shadow_matrix[3]*spos;
-			
-			float w = 1.0;
-			w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
-			shadow += pcfShadow(shadowMap3, lpos)*w;
-			weight += w;
-			shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
-		}
-
-		if (spos.z < near_split.y && spos.z > far_split.z)
-		{
-			lpos = shadow_matrix[2]*spos;
-			
-			float w = 1.0;
-			w -= max(spos.z-far_split.y, 0.0)/transition_domain.y;
-			w -= max(near_split.z-spos.z, 0.0)/transition_domain.z;
-			shadow += pcfShadow(shadowMap2, lpos)*w;
-			weight += w;
-		}
-
-		if (spos.z < near_split.x && spos.z > far_split.y)
-		{
-			lpos = shadow_matrix[1]*spos;
-			
-			float w = 1.0;
-			w -= max(spos.z-far_split.x, 0.0)/transition_domain.x;
-			w -= max(near_split.y-spos.z, 0.0)/transition_domain.y;
-			shadow += pcfShadow(shadowMap1, lpos)*w;
-			weight += w;
-		}
-
-		if (spos.z > far_split.x)
-		{
-			lpos = shadow_matrix[0]*spos;
-							
-			float w = 1.0;
-			w -= max(near_split.x-spos.z, 0.0)/transition_domain.x;
-				
-			shadow += pcfShadow(shadowMap0, lpos)*w;
-			weight += w;
-		}
-		
-
-		shadow /= weight;
-	}
-	else
-	{
-		shadow = 1.0;
-	}
-#else
-	float shadow = 1.0;
-#endif
-
-	spec = final_specular;
-	vec4 diffuse = final_color;
-	float envIntensity = final_normal.z;
-
-    vec3 col = vec3(0.0f,0.0f,0.0f);
-
-	float bloom = 0.0;
-	calcAtmospherics(pos.xyz, 1.0);
-	
-	vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
-
-	float da =dot(norm.xyz, sun_dir.xyz);
-
-    float final_da = da;
-          final_da = min(final_da, shadow);
-          //final_da = max(final_da, diffuse.a);
-          final_da = max(final_da, 0.0f);
-		  final_da = min(final_da, 1.0f);
-		  final_da = pow(final_da, 1.0/1.3);
-
-	col.rgb = atmosAmbient(col);
-	
-	float ambient = min(abs(da), 1.0);
-	ambient *= 0.5;
-	ambient *= ambient;
-	ambient = (1.0-ambient);
-
-	col.rgb *= ambient;
-
-	col.rgb = col.rgb + atmosAffectDirectionalLight(final_da);
-
-	col.rgb *= gamma_diff.rgb;
-	
-
-	float glare = 0.0;
-
-	if (spec.a > 0.0) // specular reflection
-	{
-		// the old infinite-sky shiny reflection
-		//
-				
-		float sa = dot(refnormpersp, sun_dir.xyz);
-		vec3 dumbshiny = vary_SunlitColor*shadow*(texture2D(lightFunc, vec2(sa, spec.a)).r);
-							
-		// add the two types of shiny together
-		vec3 spec_contrib = dumbshiny * spec.rgb;
-		bloom = dot(spec_contrib, spec_contrib) / 6;
-
-		glare = max(spec_contrib.r, spec_contrib.g);
-		glare = max(glare, spec_contrib.b);
-
-		col += spec_contrib;
-	}
-
-
-	col = mix(col.rgb, diffcol.rgb, diffuse.a);
-
-	if (envIntensity > 0.0)
-	{
-		//add environmentmap
-		vec3 env_vec = env_mat * refnormpersp;
-		
-		vec3 refcol = textureCube(environmentMap, env_vec).rgb;
-
-		col = mix(col.rgb, refcol, 
-			envIntensity);  
-
-		float cur_glare = max(refcol.r, refcol.g);
-		cur_glare = max(cur_glare, refcol.b);
-		cur_glare *= envIntensity*4.0;
-		glare += cur_glare;
-	}
-
-	//col = mix(atmosLighting(col), fullbrightAtmosTransport(col), diffuse.a);
-	//col = mix(scaleSoftClip(col), fullbrightScaleSoftClip(col),  diffuse.a);
-
-	col = atmosLighting(col);
-	col = scaleSoftClip(col);
-
-	//convert to linear space before adding local lights
-	col = srgb_to_linear(col);
-
-	vec3 npos = normalize(-pos.xyz);
-			
-	vec3 light = vec3(0,0,0);
-
- #define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, npos, diffuse.rgb, final_specular, pos.xyz, norm.xyz, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z, glare);
-
-		LIGHT_LOOP(1)
-		LIGHT_LOOP(2)
-		LIGHT_LOOP(3)
-		LIGHT_LOOP(4)
-		LIGHT_LOOP(5)
-		LIGHT_LOOP(6)
-		LIGHT_LOOP(7)
-
-	col.rgb += light.rgb;
-
-	glare = min(glare, 1.0);
-	float al = max(diffcol.a,glare)*vertex_color.a;
-
-	//convert to gamma space for display on screen
-	col.rgb = linear_to_srgb(col.rgb);
-
-#ifdef WATER_FOG
-	vec4 temp = applyWaterFogDeferred(pos, vec4(col.rgb, al));
-	col.rgb = temp.rgb;
-	al = temp.a;
-#endif
-
-	frag_color.rgb = col.rgb;
-	frag_color.a   = al;
-
-#else
-	frag_data[0] = final_color;
-	frag_data[1] = final_specular; // XYZ = Specular color. W = Specular exponent.
-	frag_data[2] = final_normal; // XY = Normal.  Z = Env. intensity.
-#endif
-}
-
+/**

+* @file materialF.glsl

+*

+* $LicenseInfo:firstyear=2007&license=viewerlgpl$

+* Second Life Viewer Source Code

+* Copyright (C) 2007, Linden Research, Inc.

+*

+* This library is free software; you can redistribute it and/or

+* modify it under the terms of the GNU Lesser General Public

+* License as published by the Free Software Foundation;

+* version 2.1 of the License only.

+*

+* This library is distributed in the hope that it will be useful,

+* but WITHOUT ANY WARRANTY; without even the implied warranty of

+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

+* Lesser General Public License for more details.

+*

+* You should have received a copy of the GNU Lesser General Public

+* License along with this library; if not, write to the Free Software

+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

+*

+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA

+* $/LicenseInfo$

+*/

+

+/*[EXTRA_CODE_HERE]*/

+

+//class1/deferred/materialF.glsl

+

+// This shader is used for both writing opaque/masked content to the gbuffer and writing blended content to the framebuffer during the alpha pass.

+

+#define DIFFUSE_ALPHA_MODE_NONE     0

+#define DIFFUSE_ALPHA_MODE_BLEND    1

+#define DIFFUSE_ALPHA_MODE_MASK     2

+#define DIFFUSE_ALPHA_MODE_EMISSIVE 3

+

+uniform float emissive_brightness;  // fullbright flag, 1.0 == fullbright, 0.0 otherwise

+uniform int sun_up_factor;

+

+#ifdef WATER_FOG

+vec4 applyWaterFogView(vec3 pos, vec4 color);

+#endif

+

+vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);

+vec3 scaleSoftClipFrag(vec3 l);

+

+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);

+vec3 fullbrightScaleSoftClip(vec3 light);

+

+void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao);

+

+vec3 srgb_to_linear(vec3 cs);

+vec3 linear_to_srgb(vec3 cs);

+

+#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)

+

+#ifdef DEFINE_GL_FRAGCOLOR

+out vec4 frag_color;

+#else

+#define frag_color gl_FragColor

+#endif

+

+#ifdef HAS_SUN_SHADOW

+float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen);

+#endif

+

+uniform samplerCube environmentMap;

+uniform sampler2D     lightFunc;

+

+// Inputs

+uniform vec4 morphFactor;

+uniform vec3 camPosLocal;

+uniform mat3 env_mat;

+

+uniform vec3 sun_dir;

+uniform vec3 moon_dir;

+VARYING vec2 vary_fragcoord;

+

+VARYING vec3 vary_position;

+

+uniform mat4 proj_mat;

+uniform mat4 inv_proj;

+uniform vec2 screen_res;

+

+uniform vec4 light_position[8];

+uniform vec3 light_direction[8];

+uniform vec4 light_attenuation[8];

+uniform vec3 light_diffuse[8];

+

+float getAmbientClamp();

+

+vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spec, vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight, inout float glare, float ambiance)

+{

+    vec3 col = vec3(0);

+

+    //get light vector

+    vec3 lv = lp.xyz - v;

+

+    //get distance

+    float dist = length(lv);

+    float da = 1.0;

+

+    dist /= la;

+

+    if (dist > 0.0 && la > 0.0)

+    {

+        //normalize light vector

+        lv = normalize(lv);

+

+        //distance attenuation

+        float dist_atten = clamp(1.0 - (dist - 1.0*(1.0 - fa)) / fa, 0.0, 1.0);

+        dist_atten *= dist_atten;

+        dist_atten *= 2.0f;

+

+        if (dist_atten <= 0.0)

+        {

+            return col;

+        }

+

+        // spotlight coefficient.

+        float spot = max(dot(-ln, lv), is_pointlight);

+        da *= spot*spot; // GL_SPOT_EXPONENT=2

+

+        //angular attenuation

+        da *= dot(n, lv);

+

+        float lit = 0.0f;

+

+        float amb_da = ambiance;

+        if (da >= 0)

+        {

+            lit = max(da * dist_atten, 0.0);

+            col = lit * light_col * diffuse;

+            amb_da += (da*0.5 + 0.5) * ambiance;

+        }

+        amb_da += (da*da*0.5 + 0.5) * ambiance;

+        amb_da *= dist_atten;

+        amb_da = min(amb_da, 1.0f - lit);

+

+        // SL-10969 need to see why these are blown out

+        //col.rgb += amb_da * light_col * diffuse;

+

+        if (spec.a > 0.0)

+        {

+            //vec3 ref = dot(pos+lv, norm);

+            vec3 h = normalize(lv + npos);

+            float nh = dot(n, h);

+            float nv = dot(n, npos);

+            float vh = dot(npos, h);

+            float sa = nh;

+            float fres = pow(1 - dot(h, npos), 5)*0.4 + 0.5;

+

+            float gtdenom = 2 * nh;

+            float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));

+

+            if (nh > 0.0)

+            {

+                float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt / (nh*da);

+                vec3 speccol = lit*scol*light_col.rgb*spec.rgb;

+                speccol = clamp(speccol, vec3(0), vec3(1));

+                col += speccol;

+

+                float cur_glare = max(speccol.r, speccol.g);

+                cur_glare = max(cur_glare, speccol.b);

+                glare = max(glare, speccol.r);

+                glare += max(cur_glare, 0.0);

+            }

+        }

+    }

+

+    return max(col, vec3(0.0, 0.0, 0.0));

+}

+

+#else

+#ifdef DEFINE_GL_FRAGCOLOR

+out vec4 frag_data[3];

+#else

+#define frag_data gl_FragData

+#endif

+#endif

+

+uniform sampler2D diffuseMap;  //always in sRGB space

+

+#ifdef HAS_NORMAL_MAP

+uniform sampler2D bumpMap;

+#endif

+

+#ifdef HAS_SPECULAR_MAP

+uniform sampler2D specularMap;

+

+VARYING vec2 vary_texcoord2;

+#endif

+

+uniform float env_intensity;

+uniform vec4 specular_color;  // specular color RGB and specular exponent (glossiness) in alpha

+

+#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_MASK)

+uniform float minimum_alpha;

+#endif

+

+#ifdef HAS_NORMAL_MAP

+VARYING vec3 vary_mat0;

+VARYING vec3 vary_mat1;

+VARYING vec3 vary_mat2;

+VARYING vec2 vary_texcoord1;

+#else

+VARYING vec3 vary_normal;

+#endif

+

+VARYING vec4 vertex_color;

+VARYING vec2 vary_texcoord0;

+

+vec2 encode_normal(vec3 n);

+

+void main()

+{

+    vec2 pos_screen = vary_texcoord0.xy;

+

+    vec4 diffcol = texture2D(diffuseMap, vary_texcoord0.xy);

+	diffcol.rgb *= vertex_color.rgb;

+

+#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_MASK)

+

+    // Comparing floats cast from 8-bit values, produces acne right at the 8-bit transition points

+    float bias = 0.001953125; // 1/512, or half an 8-bit quantization

+    if (diffcol.a < minimum_alpha-bias)

+    {

+        discard;

+    }

+#endif

+

+#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)

+	vec3 gamma_diff = diffcol.rgb;

+	diffcol.rgb = srgb_to_linear(diffcol.rgb);

+#endif

+

+#ifdef HAS_SPECULAR_MAP

+    vec4 spec = texture2D(specularMap, vary_texcoord2.xy);

+    spec.rgb *= specular_color.rgb;

+#else

+    vec4 spec = vec4(specular_color.rgb, 1.0);

+#endif

+

+#ifdef HAS_NORMAL_MAP

+	vec4 norm = texture2D(bumpMap, vary_texcoord1.xy);

+

+	norm.xyz = norm.xyz * 2 - 1;

+

+	vec3 tnorm = vec3(dot(norm.xyz,vary_mat0),

+			  dot(norm.xyz,vary_mat1),

+			  dot(norm.xyz,vary_mat2));

+#else

+	vec4 norm = vec4(0,0,0,1.0);

+	vec3 tnorm = vary_normal;

+#endif

+

+    norm.xyz = normalize(tnorm.xyz);

+

+    vec2 abnormal = encode_normal(norm.xyz);

+

+    vec4 final_color = diffcol;

+

+#if (DIFFUSE_ALPHA_MODE != DIFFUSE_ALPHA_MODE_EMISSIVE)

+	final_color.a = emissive_brightness;

+#else

+	final_color.a = max(final_color.a, emissive_brightness);

+#endif

+

+    vec4 final_specular = spec;

+    

+#ifdef HAS_SPECULAR_MAP

+    vec4 final_normal = vec4(encode_normal(normalize(tnorm)), env_intensity * spec.a, 0.0);

+	final_specular.a = specular_color.a * norm.a;

+#else

+	vec4 final_normal = vec4(encode_normal(normalize(tnorm)), env_intensity, 0.0);

+	final_specular.a = specular_color.a;

+#endif

+

+#if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)

+

+    //forward rendering, output just lit sRGBA

+    vec3 pos = vary_position;

+

+    float shadow = 1.0f;

+

+#ifdef HAS_SUN_SHADOW

+    shadow = sampleDirectionalShadow(pos.xyz, norm.xyz, pos_screen);

+#endif

+

+    spec = final_specular;

+    vec4 diffuse = final_color;

+    float envIntensity = final_normal.z;

+

+    vec3 color = vec3(0,0,0);

+

+    vec3 light_dir = (sun_up_factor == 1) ? sun_dir : moon_dir;

+

+    float bloom = 0.0;

+    vec3 sunlit;

+    vec3 amblit;

+    vec3 additive;

+    vec3 atten;

+

+    calcAtmosphericVars(pos.xyz, light_dir, 1.0, sunlit, amblit, additive, atten, false);

+    

+        // This call breaks the Mac GLSL compiler/linker for unknown reasons (17Mar2020)

+        // The call is either a no-op or a pure (pow) gamma adjustment, depending on GPU level

+        // TODO: determine if we want to re-apply the gamma adjustment, and if so understand & fix Mac breakage

+        //color = fullbrightScaleSoftClip(color);

+

+    vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));

+

+    //we're in sRGB space, so gamma correct this dot product so 

+    // lighting from the sun stays sharp

+    float da = clamp(dot(normalize(norm.xyz), light_dir.xyz), 0.0, 1.0);

+    da = pow(da, 1.0 / 1.3);

+

+    color = amblit;

+

+    //darken ambient for normals perpendicular to light vector so surfaces in shadow 

+    // and facing away from light still have some definition to them.

+    // do NOT gamma correct this dot product so ambient lighting stays soft

+    float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0);

+    ambient *= 0.5;

+    ambient *= ambient;

+    ambient = (1.0 - ambient);

+

+    vec3 sun_contrib = min(da, shadow) * sunlit;

+    

+    color *= ambient;

+

+    color += sun_contrib;

+

+    color *= gamma_diff.rgb;

+

+    float glare = 0.0;

+

+    if (spec.a > 0.0) // specular reflection

+    {

+#if 1 //EEP

+

+        vec3 npos = -normalize(pos.xyz);

+

+        //vec3 ref = dot(pos+lv, norm);

+        vec3 h = normalize(light_dir.xyz + npos);

+        float nh = dot(norm.xyz, h);

+        float nv = dot(norm.xyz, npos);

+        float vh = dot(npos, h);

+        float sa = nh;

+        float fres = pow(1 - dot(h, npos), 5)*0.4 + 0.5;

+

+        float gtdenom = 2 * nh;

+        float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));

+

+        if (nh > 0.0)

+        {

+            float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt / (nh*da);

+            vec3 sp = sun_contrib*scol / 6.0f;

+            sp = clamp(sp, vec3(0), vec3(1));

+            bloom = dot(sp, sp) / 4.0;

+            color += sp * spec.rgb;

+        }

+#else // PRODUCTION

+        float sa = dot(refnormpersp, sun_dir.xyz);

+		vec3 dumbshiny = sunlit*shadow*(texture2D(lightFunc, vec2(sa, spec.a)).r);

+							

+		// add the two types of shiny together

+		vec3 spec_contrib = dumbshiny * spec.rgb;

+		bloom = dot(spec_contrib, spec_contrib) / 6;

+

+		glare = max(spec_contrib.r, spec_contrib.g);

+		glare = max(glare, spec_contrib.b);

+

+		color += spec_contrib;

+#endif

+    }

+

+    color = mix(color.rgb, diffcol.rgb, diffuse.a);

+    

+    if (envIntensity > 0.0)

+    {

+        //add environmentmap

+        vec3 env_vec = env_mat * refnormpersp;

+

+        vec3 reflected_color = textureCube(environmentMap, env_vec).rgb;

+

+        color = mix(color, reflected_color, envIntensity);

+

+        float cur_glare = max(reflected_color.r, reflected_color.g);

+        cur_glare = max(cur_glare, reflected_color.b);

+        cur_glare *= envIntensity*4.0;

+        glare += cur_glare;

+    }

+

+    color = atmosFragLighting(color, additive, atten);

+    color = scaleSoftClipFrag(color);

+

+    //convert to linear before adding local lights

+    color = srgb_to_linear(color);

+

+    vec3 npos = normalize(-pos.xyz);

+

+    vec3 light = vec3(0, 0, 0);

+    

+#define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, npos, diffuse.rgb, final_specular, pos.xyz, norm.xyz, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z, glare, light_attenuation[i].w );

+

+    LIGHT_LOOP(1)

+        LIGHT_LOOP(2)

+        LIGHT_LOOP(3)

+        LIGHT_LOOP(4)

+        LIGHT_LOOP(5)

+        LIGHT_LOOP(6)

+        LIGHT_LOOP(7)

+

+    color += light;

+

+    glare = min(glare, 1.0);

+    float al = max(diffcol.a, glare)*vertex_color.a;

+

+    //convert to srgb as this color is being written post gamma correction

+    color = linear_to_srgb(color);

+

+#ifdef WATER_FOG

+    vec4 temp = applyWaterFogView(pos, vec4(color, al));

+    color = temp.rgb;

+    al = temp.a;

+#endif

+

+    frag_color = vec4(color, al);

+

+#else // mode is not DIFFUSE_ALPHA_MODE_BLEND, encode to gbuffer 

+

+    // deferred path

+    frag_data[0] = final_color; //gbuffer is sRGB

+    frag_data[1] = final_specular; // XYZ = Specular color. W = Specular exponent.

+    frag_data[2] = final_normal; // XY = Normal.  Z = Env. intensity.

+#endif

+}

+

diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl
index 393d1e69da..7e29ada205 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl
@@ -28,7 +28,7 @@
 #define DIFFUSE_ALPHA_MODE_MASK 2
 #define DIFFUSE_ALPHA_MODE_EMISSIVE 3
 
-#if HAS_SKIN
+#ifdef HAS_SKIN
 uniform mat4 modelview_matrix;
 uniform mat4 projection_matrix;
 mat4 getObjectSkinnedTransform();
@@ -39,7 +39,7 @@ uniform mat4 modelview_projection_matrix;
 
 #if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
 
-#if !HAS_SKIN
+#if !defined(HAS_SKIN)
 uniform mat4 modelview_matrix;
 #endif
 
@@ -55,7 +55,7 @@ ATTRIBUTE vec3 normal;
 ATTRIBUTE vec2 texcoord0;
 
 
-#if HAS_NORMAL_MAP
+#ifdef HAS_NORMAL_MAP
 ATTRIBUTE vec4 tangent;
 ATTRIBUTE vec2 texcoord1;
 
@@ -68,7 +68,7 @@ VARYING vec2 vary_texcoord1;
 VARYING vec3 vary_normal;
 #endif
 
-#if HAS_SPECULAR_MAP
+#ifdef HAS_SPECULAR_MAP
 ATTRIBUTE vec2 texcoord2;
 VARYING vec2 vary_texcoord2;
 #endif
@@ -78,7 +78,7 @@ VARYING vec2 vary_texcoord0;
 
 void main()
 {
-#if HAS_SKIN
+#ifdef HAS_SKIN
 	mat4 mat = getObjectSkinnedTransform();
 
 	mat = modelview_matrix * mat;
@@ -99,17 +99,17 @@ void main()
 	
 	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
 	
-#if HAS_NORMAL_MAP
+#ifdef HAS_NORMAL_MAP
 	vary_texcoord1 = (texture_matrix0 * vec4(texcoord1,0,1)).xy;
 #endif
 
-#if HAS_SPECULAR_MAP
+#ifdef HAS_SPECULAR_MAP
 	vary_texcoord2 = (texture_matrix0 * vec4(texcoord2,0,1)).xy;
 #endif
 
-#if HAS_SKIN
+#ifdef HAS_SKIN
 	vec3 n = normalize((mat*vec4(normal.xyz+position.xyz,1.0)).xyz-pos.xyz);
-#if HAS_NORMAL_MAP
+#ifdef HAS_NORMAL_MAP
 	vec3 t = normalize((mat*vec4(tangent.xyz+position.xyz,1.0)).xyz-pos.xyz);
 	vec3 b = cross(n, t)*tangent.w;
 	
@@ -121,7 +121,7 @@ vary_normal  = n;
 #endif //HAS_NORMAL_MAP
 #else //HAS_SKIN
 	vec3 n = normalize(normal_matrix * normal);
-#if HAS_NORMAL_MAP
+#ifdef HAS_NORMAL_MAP
 	vec3 t = normalize(normal_matrix * tangent.xyz);
 	vec3 b = cross(n,t)*tangent.w;
 	//vec3 t = cross(b,n) * binormal.w;
@@ -137,7 +137,7 @@ vary_normal  = n;
 	vertex_color = diffuse_color;
 
 #if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
-#if !HAS_SKIN
+#if !defined(HAS_SKIN)
 	vary_position = (modelview_matrix*vec4(position.xyz, 1.0)).xyz;
 #endif
 #endif
diff --git a/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl b/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
new file mode 100644
index 0000000000..80f232948a
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
@@ -0,0 +1,74 @@
+/** 
+ * @file moonF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_data[3];
+#else
+#define frag_data gl_FragData
+#endif
+
+uniform vec4 color;
+uniform vec4 sunlight_color;
+uniform vec4 moonlight_color;
+uniform vec3 lumWeights;
+uniform float moon_brightness;
+uniform float minLuminance;
+uniform sampler2D diffuseMap;
+uniform sampler2D altDiffuseMap;
+uniform float blend_factor; // interp factor between moon A/B
+VARYING vec2 vary_texcoord0;
+
+vec3 srgb_to_linear(vec3 c);
+void main() 
+{
+    vec4 moonA = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 moonB = texture2D(altDiffuseMap, vary_texcoord0.xy);
+    vec4 c     = mix(moonA, moonB, blend_factor);
+
+    c.rgb = srgb_to_linear(c.rgb);
+
+    // mix factor which blends when sunlight is brighter
+    // and shows true moon color at night
+    vec3 luma_weights = vec3(0.3, 0.5, 0.3);
+
+    vec4 light_color = max(sunlight_color, moonlight_color);
+    float mix = 1.0 - dot(normalize(light_color.rgb), luma_weights);
+
+    vec3 exp = vec3(1.0 - mix * moon_brightness) * 2.0  - 1.0;
+    c.rgb = pow(c.rgb, exp);
+
+    //c.rgb *= moonlight_color.rgb;
+
+    frag_data[0] = vec4(c.rgb, c.a);
+    frag_data[1] = vec4(0.0);
+    frag_data[2] = vec4(0.0f);
+
+    gl_FragDepth = 0.999985f;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/moonV.glsl b/indra/newview/app_settings/shaders/class1/deferred/moonV.glsl
new file mode 100644
index 0000000000..e1bac4f248
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/moonV.glsl
@@ -0,0 +1,49 @@
+/** 
+ * @file moonV.glsl
+ *
+  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_matrix;
+uniform mat4 modelview_projection_matrix;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec2 texcoord0;
+
+VARYING vec2 vary_texcoord0;
+
+void calcAtmospherics(vec3 eye_pos);
+
+void main()
+{
+    //transform vertex
+    vec3 offset = vec3(0, 0, 50);
+    vec4 vert = vec4(position.xyz - offset, 1.0);
+    vec4 pos = (modelview_matrix * vert);
+
+    gl_Position = modelview_projection_matrix*vert;
+
+    calcAtmospherics(pos.xyz);
+    
+    vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
index 9974f8f31b..0d1cc81786 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
@@ -36,7 +36,6 @@ out vec4 frag_color;
 uniform sampler2DRect depthMap;
 uniform sampler2DRect diffuseRect;
 uniform sampler2DRect specularRect;
-uniform sampler2DRect normalMap;
 uniform samplerCube environmentMap;
 uniform sampler2D noiseMap;
 uniform sampler2D lightFunc;
@@ -57,38 +56,17 @@ uniform float far_z;
 
 uniform mat4 inv_proj;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
+vec3 srgb_to_linear(vec3 c);
 
 void main() 
 {
+	vec3 out_col = vec3(0,0,0);
+
+#if defined(LOCAL_LIGHT_KILL)
+    discard;
+#else
 	vec2 frag = (vary_fragcoord.xy*0.5+0.5)*screen_res;
 	vec3 pos = getPosition(frag.xy).xyz;
 	if (pos.z < far_z)
@@ -96,14 +74,13 @@ void main()
 		discard;
 	}
 	
-	vec3 norm = texture2DRect(normalMap, frag.xy).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
-	norm = normalize(norm);
+	vec3 norm = getNorm(frag.xy);
+
 	vec4 spec = texture2DRect(specularRect, frag.xy);
 	vec3 diff = texture2DRect(diffuseRect, frag.xy).rgb;
+    diff.rgb = srgb_to_linear(diff.rgb);
 	
 	float noise = texture2D(noiseMap, frag.xy/128.0).b;
-	vec3 out_col = vec3(0,0,0);
 	vec3 npos = normalize(-pos);
 
 	// As of OSX 10.6.7 ATI Apple's crash when using a variable size loop
@@ -123,6 +100,9 @@ void main()
 			float fa = light_col[i].a+1.0;
 			float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
 			dist_atten *= dist_atten;
+            
+            // Tweak falloff slightly to match pre-EEP attenuation
+			// NOTE: this magic number also shows up in a great many other places, search for dist_atten *= to audit
 			dist_atten *= 2.0;
 			
 			dist_atten *= noise;
@@ -159,7 +139,7 @@ void main()
 		}
 	}
 	}
-	
+#endif
 	
 	frag_color.rgb = out_col;
 	frag_color.a = 0.0;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
index 3a3e871ade..9bba45bc4e 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
@@ -30,14 +30,14 @@
 #extension GL_ARB_texture_rectangle : enable
 #extension GL_ARB_shader_texture_lod : enable
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
 #define frag_color gl_FragColor
 #endif
 
-/*[EXTRA_CODE_HERE]*/
-
 uniform sampler2DRect diffuseRect;
 uniform sampler2DRect specularRect;
 uniform sampler2DRect depthMap;
@@ -71,60 +71,8 @@ VARYING vec4 vary_fragcoord;
 uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
-
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
+vec3 getNorm(vec2 pos_screen);
+vec3 srgb_to_linear(vec3 c);
 
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 {
@@ -178,22 +126,15 @@ vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 	return ret;
 }
 
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
+vec4 getPosition(vec2 pos_screen);
 
 void main() 
 {
+	vec3 col = vec3(0,0,0);
+
+#if defined(LOCAL_LIGHT_KILL)
+    discard;
+#else
 	vec4 frag = vary_fragcoord;
 	frag.xyz /= frag.w;
 	frag.xyz = frag.xyz*0.5+0.5;
@@ -208,12 +149,9 @@ void main()
 		discard;
 	}
 		
-	vec3 norm = texture2DRect(normalMap, frag.xy).xyz;
-	float envIntensity = norm.z;
+	float envIntensity = texture2DRect(normalMap, frag.xy).z;
+	vec3 norm = getNorm(frag.xy);
 
-	norm = decode_normal(norm.xy);
-	
-	norm = normalize(norm);
 	float l_dist = -dot(lv, proj_n);
 	
 	vec4 proj_tc = (proj_mat * vec4(pos.xyz, 1.0));
@@ -225,25 +163,33 @@ void main()
 	proj_tc.xyz /= proj_tc.w;
 	
 	float fa = falloff+1.0;
-	float dist_atten = min(1.0-(dist-1.0*(1.0-fa))/fa, 1.0);
+	float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
 	dist_atten *= dist_atten;
 	dist_atten *= 2.0;
+	
 
 	if (dist_atten <= 0.0)
 	{
 		discard;
 	}
 	
+	float noise = texture2D(noiseMap, frag.xy/128.0).b;
+	dist_atten *= noise;
+
 	lv = proj_origin-pos.xyz;
 	lv = normalize(lv);
 	float da = dot(norm, lv);
 		
-	vec3 col = vec3(0,0,0);
 		
 	vec3 diff_tex = texture2DRect(diffuseRect, frag.xy).rgb;
+    // SL-12005 Projector light pops as we get closer, more objectionable than being in wrong color space.
+    //          We can't switch to linear here unless we do it everywhere*
+	// *gbuffer is sRGB, convert to linear whenever sampling from it
+    diff_tex.rgb = srgb_to_linear(diff_tex.rgb);
+
 	vec3 dlit = vec3(0, 0, 0);
 	
-	float noise = texture2D(noiseMap, frag.xy/128.0).b;
+	
 	if (proj_tc.z > 0.0 &&
 		proj_tc.x < 1.0 &&
 		proj_tc.y < 1.0 &&
@@ -262,7 +208,7 @@ void main()
 		
 			dlit = color.rgb * plcol.rgb * plcol.a;
 			
-			lit = da * dist_atten * noise;
+			lit = da * dist_atten;
 			
 			col = dlit*lit*diff_tex;
 			amb_da += (da*0.5)*proj_ambiance;
@@ -304,7 +250,7 @@ void main()
 			col += dlit*scol*spec.rgb;
 			//col += spec.rgb;
 		}
-	}	
+	}
 
 	if (envIntensity > 0.0)
 	{
@@ -334,7 +280,9 @@ void main()
 			}
 		}
 	}
-	
+#endif
+
+	//output linear, sum of lights will be gamma corrected later	
 	frag_color.rgb = col;	
 	frag_color.a = 0.0;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
index aba4a01754..d805c9ea48 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
@@ -56,103 +56,78 @@ uniform vec2 screen_res;
 uniform mat4 inv_proj;
 uniform vec4 viewport;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	vec2 sc = (pos_screen.xy-viewport.xy)*2.0;
-	sc /= viewport.zw;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
+vec3 getNorm(vec2 pos_screen);
+vec4 getPosition(vec2 pos_screen);
+vec3 srgb_to_linear(vec3 c);
 
 void main() 
 {
-	vec4 frag = vary_fragcoord;
-	frag.xyz /= frag.w;
-	frag.xyz = frag.xyz*0.5+0.5;
-	frag.xy *= screen_res;
-	
-	vec3 pos = getPosition(frag.xy).xyz;
-	vec3 lv = trans_center.xyz-pos;
-	float dist = length(lv);
-	dist /= size;
-	if (dist > 1.0)
-	{
-		discard;
-	}
-	
-	vec3 norm = texture2DRect(normalMap, frag.xy).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
-	float da = dot(norm, lv);
-	if (da < 0.0)
-	{
-		discard;
-	}
-	
-	norm = normalize(norm);
-	lv = normalize(lv);
-	da = dot(norm, lv);
-	
-	float noise = texture2D(noiseMap, frag.xy/128.0).b;
-	
-	vec3 col = texture2DRect(diffuseRect, frag.xy).rgb;
-	float fa = falloff+1.0;
-	float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
-	dist_atten *= dist_atten;
-	dist_atten *= 2.0;
-	
-	float lit = da * dist_atten * noise;
-
-	col = color.rgb*lit*col;
-
-	vec4 spec = texture2DRect(specularRect, frag.xy);
-	if (spec.a > 0.0)
-	{
-		lit = min(da*6.0, 1.0) * dist_atten;
-
-		vec3 npos = -normalize(pos);
-		vec3 h = normalize(lv+npos);
-		float nh = dot(norm, h);
-		float nv = dot(norm, npos);
-		float vh = dot(npos, h);
-		float sa = nh;
-		float fres = pow(1 - dot(h, npos), 5) * 0.4+0.5;
-		float gtdenom = 2 * nh;
-		float gt = max(0,(min(gtdenom * nv / vh, gtdenom * da / vh)));
-
-		if (nh > 0.0)
-		{
-			float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
-			col += lit*scol*color.rgb*spec.rgb;
-		}
-	}
-	
-	if (dot(col, col) <= 0.0)
-	{
-		discard;
-	}
-		
-	frag_color.rgb = col;	
-	frag_color.a = 0.0;
+    vec4 frag = vary_fragcoord;
+    frag.xyz /= frag.w;
+    frag.xyz = frag.xyz*0.5+0.5;
+    frag.xy *= screen_res;
+    
+    vec3 pos = getPosition(frag.xy).xyz;
+    vec3 lv = trans_center.xyz-pos;
+    float dist = length(lv);
+    dist /= size;
+    if (dist > 1.0)
+    {
+        discard;
+    }
+    
+    vec3 norm = getNorm(frag.xy);
+
+    float da = dot(norm, lv);
+    if (da < 0.0)
+    {
+        discard;
+    }
+    
+    lv = normalize(lv);
+    da = dot(norm, lv);
+    
+    float noise = texture2D(noiseMap, frag.xy/128.0).b;
+    
+    vec3 col = texture2DRect(diffuseRect, frag.xy).rgb;
+    col.rgb = srgb_to_linear(col.rgb);
+
+    float fa = falloff+1.0;
+    float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
+    dist_atten *= dist_atten;
+    dist_atten *= 2.0;
+    
+    float lit = da * dist_atten * noise;
+
+    col = color.rgb*lit*col;
+
+    vec4 spec = texture2DRect(specularRect, frag.xy);
+    if (spec.a > 0.0)
+    {
+        lit = min(da*6.0, 1.0) * dist_atten;
+
+        vec3 npos = -normalize(pos);
+        vec3 h = normalize(lv+npos);
+        float nh = dot(norm, h);
+        float nv = dot(norm, npos);
+        float vh = dot(npos, h);
+        float sa = nh;
+        float fres = pow(1 - dot(h, npos), 5) * 0.4+0.5;
+        float gtdenom = 2 * nh;
+        float gt = max(0,(min(gtdenom * nv / vh, gtdenom * da / vh)));
+
+        if (nh > 0.0)
+        {
+            float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
+            col += lit*scol*color.rgb*spec.rgb;
+        }
+    }
+    
+    if (dot(col, col) <= 0.0)
+    {
+        discard;
+    }
+//col.rgb = vec3(0);        
+    frag_color.rgb = col;   
+    frag_color.a = 0.0;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pointLightV.glsl b/indra/newview/app_settings/shaders/class1/deferred/pointLightV.glsl
index a5625fbc16..3da8531442 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/pointLightV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/pointLightV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file pointLightF.glsl
+ * @file pointLightV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
index 6669947d1b..cd37a34e0d 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
@@ -37,33 +37,16 @@ uniform sampler2DRect diffuseRect;
 
 uniform vec2 screen_res;
 VARYING vec2 vary_fragcoord;
-
 uniform float display_gamma;
 
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
+vec3 linear_to_srgb(vec3 cl);
 
 void main() 
 {
-	vec4 diff = texture2DRect(diffuseRect, vary_fragcoord);
-	diff.rgb = linear_to_srgb(diff.rgb);
-	frag_color = diff;
+    //this is the one of the rare spots where diffuseRect contains linear color values (not sRGB)
+    vec4 diff = texture2DRect(diffuseRect, vary_fragcoord);
+    //diff.rgb = pow(diff.rgb, vec3(display_gamma));
+    diff.rgb = linear_to_srgb(diff.rgb);
+    frag_color = diff;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postgiF.glsl b/indra/newview/app_settings/shaders/class1/deferred/postgiF.glsl
index 018ced4cad..cf994d3547 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postgiF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postgiF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
  #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
@@ -47,18 +49,7 @@ VARYING vec2 vary_fragcoord;
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
 
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).a;
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
+vec4 getPosition(vec2 pos_screen);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl
new file mode 100644
index 0000000000..44f2a73e1f
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl
@@ -0,0 +1,55 @@
+/** 
+ * @file shadowAlphaMaskF.glsl
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform sampler2D diffuseMap;
+
+#if !defined(DEPTH_CLAMP)
+VARYING float pos_zd2;
+#endif
+
+VARYING float pos_w;
+
+VARYING float target_pos_x;
+VARYING vec4 vertex_color;
+VARYING vec2 vary_texcoord0;
+
+void main() 
+{
+	float alpha = diffuseLookup(vary_texcoord0.xy).a * vertex_color.a;
+
+	frag_color = vec4(alpha, alpha, alpha, 1);
+	
+#if !defined(DEPTH_CLAMP)
+	gl_FragDepth = max(pos_zd2/pos_w+0.5, 0.0);
+#endif
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl
new file mode 100644
index 0000000000..f45c343066
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl
@@ -0,0 +1,67 @@
+/** 
+ * @file shadowAlphaMaskV.glsl
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_projection_matrix;
+uniform float shadow_target_width;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec4 diffuse_color;
+ATTRIBUTE vec2 texcoord0;
+
+#if !defined(DEPTH_CLAMP)
+VARYING float pos_zd2;
+#endif
+
+VARYING float pos_w;
+
+VARYING float target_pos_x;
+VARYING vec4 vertex_color;
+VARYING vec2 vary_texcoord0;
+
+void passTextureIndex();
+
+void main()
+{
+	//transform vertex
+	vec4 pre_pos = vec4(position.xyz, 1.0);
+	vec4 pos = modelview_projection_matrix * pre_pos;
+	target_pos_x = 0.5 * (shadow_target_width - 1.0) * pos.x;
+
+	pos_w = pos.w;
+
+#if !defined(DEPTH_CLAMP)
+	pos_zd2 = pos.z * 0.5;
+	
+	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
+#else
+	gl_Position = pos;
+#endif
+	
+	passTextureIndex();
+
+	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+	vertex_color = diffuse_color;
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl
index 91a96977f0..9b8df0a5a4 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
@@ -31,19 +33,25 @@ out vec4 frag_color;
 
 uniform sampler2D diffuseMap;
 
-#if !DEPTH_CLAMP
-VARYING float pos_zd2;
-#endif
-
-VARYING float pos_w;
-
+VARYING vec4 post_pos;
 VARYING float target_pos_x;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
+uniform float minimum_alpha;
 
 void main() 
 {
-	float alpha = diffuseLookup(vary_texcoord0.xy).a * vertex_color.a;
+	float alpha = diffuseLookup(vary_texcoord0.xy).a;
+
+    // mask cutoff 0 -> no shadow SL-11051
+    if (minimum_alpha == 0)
+    {
+        discard;
+    }
+
+#if !defined(IS_FULLBRIGHT)
+    alpha *= vertex_color.a;
+#endif
 
 	if (alpha < 0.05) // treat as totally transparent
 	{
@@ -52,7 +60,7 @@ void main()
 
 	if (alpha < 0.88) // treat as semi-transparent
 	{
-	  if (fract(0.5*floor(target_pos_x / pos_w )) < 0.25)
+	  if (fract(0.5*floor(target_pos_x / post_pos.w )) < 0.25)
 	  {
 	    discard;
 	  }
@@ -60,7 +68,7 @@ void main()
 
 	frag_color = vec4(1,1,1,1);
 	
-#if !DEPTH_CLAMP
-	gl_FragDepth = max(pos_zd2/pos_w+0.5, 0.0);
+#if !defined(DEPTH_CLAMP)
+	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
 #endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskV.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskV.glsl
index 11411a605c..b6a0f0b165 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskV.glsl
@@ -31,12 +31,7 @@ ATTRIBUTE vec3 position;
 ATTRIBUTE vec4 diffuse_color;
 ATTRIBUTE vec2 texcoord0;
 
-#if !DEPTH_CLAMP
-VARYING float pos_zd2;
-#endif
-
-VARYING float pos_w;
-
+VARYING vec4 post_pos;
 VARYING float target_pos_x;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
@@ -50,11 +45,9 @@ void main()
 	vec4 pos = modelview_projection_matrix * pre_pos;
 	target_pos_x = 0.5 * (shadow_target_width - 1.0) * pos.x;
 
-	pos_w = pos.w;
+	post_pos = pos;
 
-#if !DEPTH_CLAMP
-	pos_zd2 = pos.z * 0.5;
-	
+#if !defined(DEPTH_CLAMP)
 	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
 #else
 	gl_Position = pos;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowCubeV.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowCubeV.glsl
index ef153dfc5b..0e74d2eb8a 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowCubeV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowCubeV.glsl
@@ -27,7 +27,7 @@ uniform mat4 modelview_projection_matrix;
 
 ATTRIBUTE vec3 position;
 
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 VARYING vec4 post_pos;
 #endif
 
@@ -40,7 +40,7 @@ void main()
 	vec3 p = position*box_size+box_center;
 	vec4 pos = modelview_projection_matrix*vec4(p.xyz, 1.0);
 
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 	post_pos = pos;
 
 	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl
index 3d1b182875..1ea96918bb 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl
@@ -23,21 +23,21 @@
  * $/LicenseInfo$
  */
  
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
 #define frag_color gl_FragColor
 #endif
 
-#if !DEPTH_CLAMP
 VARYING vec4 post_pos;
-#endif
 
 void main() 
 {
 	frag_color = vec4(1,1,1,1);
 	
-#if !DEPTH_CLAMP
+#if !defined(DEPTH_CLAMP)
 	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
 #endif
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowUtil.glsl
new file mode 100644
index 0000000000..4134220306
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowUtil.glsl
@@ -0,0 +1,221 @@
+/** 
+ * @file class1/deferred/shadowUtil.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform sampler2DRect   normalMap;
+uniform sampler2DRect   depthMap;
+uniform sampler2DShadow shadowMap0;
+uniform sampler2DShadow shadowMap1;
+uniform sampler2DShadow shadowMap2;
+uniform sampler2DShadow shadowMap3;
+uniform sampler2DShadow shadowMap4;
+uniform sampler2DShadow shadowMap5;
+
+uniform vec3 sun_dir;
+uniform vec3 moon_dir;
+uniform vec2 shadow_res;
+uniform vec2 proj_shadow_res;
+uniform mat4 shadow_matrix[6];
+uniform vec4 shadow_clip;
+uniform float shadow_bias;
+uniform float shadow_offset;
+uniform float spot_shadow_bias;
+uniform float spot_shadow_offset;
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+uniform int sun_up_factor;
+
+float pcfShadow(sampler2DShadow shadowMap, vec3 norm, vec4 stc, float bias_mul, vec2 pos_screen, vec3 light_dir)
+{
+    float offset = shadow_bias * bias_mul;
+    stc.xyz /= stc.w;
+    stc.z += offset * 2.0;
+    stc.x = floor(stc.x*shadow_res.x + fract(pos_screen.y*shadow_res.y))/shadow_res.x; // add some chaotic jitter to X sample pos according to Y to disguise the snapping going on here
+    float cs = shadow2D(shadowMap, stc.xyz).x;
+    float shadow = cs * 4.0;
+    shadow += shadow2D(shadowMap, stc.xyz+vec3( 1.5/shadow_res.x,  0.5/shadow_res.y, 0.0)).x;
+    shadow += shadow2D(shadowMap, stc.xyz+vec3( 0.5/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
+    shadow += shadow2D(shadowMap, stc.xyz+vec3(-1.5/shadow_res.x, -0.5/shadow_res.y, 0.0)).x;
+    shadow += shadow2D(shadowMap, stc.xyz+vec3(-0.5/shadow_res.x,  1.5/shadow_res.y, 0.0)).x;
+    return clamp(shadow * 0.125, 0.0, 1.0);
+}
+
+float pcfSpotShadow(sampler2DShadow shadowMap, vec4 stc, float bias_scale, vec2 pos_screen)
+{
+    stc.xyz /= stc.w;
+    stc.z += spot_shadow_bias * bias_scale;
+    stc.x = floor(proj_shadow_res.x * stc.x + fract(pos_screen.y*0.666666666)) / proj_shadow_res.x; // snap
+
+    float cs = shadow2D(shadowMap, stc.xyz).x;
+    float shadow = cs;
+
+    vec2 off = 1.0/proj_shadow_res;
+    off.y *= 1.5;
+    
+    shadow += shadow2D(shadowMap, stc.xyz+vec3(off.x*2.0, off.y, 0.0)).x;
+    shadow += shadow2D(shadowMap, stc.xyz+vec3(off.x, -off.y, 0.0)).x;
+    shadow += shadow2D(shadowMap, stc.xyz+vec3(-off.x, off.y, 0.0)).x;
+    shadow += shadow2D(shadowMap, stc.xyz+vec3(-off.x*2.0, -off.y, 0.0)).x;
+    return shadow*0.2;
+}
+
+float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen)
+{
+    float shadow = 0.0f;
+    vec3 light_dir = normalize((sun_up_factor == 1) ? sun_dir : moon_dir);
+
+    float dp_directional_light = max(0.0, dot(norm.xyz, light_dir));
+          dp_directional_light = clamp(dp_directional_light, 0.0, 1.0);
+
+    vec3 shadow_pos = pos.xyz;
+
+    vec3 offset = light_dir.xyz * (1.0 - dp_directional_light);
+
+    shadow_pos += offset * shadow_offset * 2.0;
+
+    vec4 spos = vec4(shadow_pos.xyz, 1.0);
+
+    if (spos.z > -shadow_clip.w)
+    {   
+        vec4 lpos;
+        vec4 near_split = shadow_clip*-0.75;
+        vec4 far_split = shadow_clip*-1.25;
+        vec4 transition_domain = near_split-far_split;
+        float weight = 0.0;
+
+        if (spos.z < near_split.z)
+        {
+            lpos = shadow_matrix[3]*spos;
+            
+            float w = 1.0;
+            w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
+            //w = clamp(w, 0.0, 1.0);
+            float contrib = pcfShadow(shadowMap3, norm, lpos, 1.0, pos_screen, light_dir)*w;
+            //if (contrib > 0)
+            {
+                shadow += contrib;
+                weight += w;
+            }
+            shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
+        }
+
+        if (spos.z < near_split.y && spos.z > far_split.z)
+        {
+            lpos = shadow_matrix[2]*spos;
+            
+            float w = 1.0;
+            w -= max(spos.z-far_split.y, 0.0)/transition_domain.y;
+            w -= max(near_split.z-spos.z, 0.0)/transition_domain.z;
+            //w = clamp(w, 0.0, 1.0);
+            float contrib = pcfShadow(shadowMap2, norm, lpos, 1.0, pos_screen, light_dir)*w;
+            //if (contrib > 0)
+            {
+                shadow += contrib;
+                weight += w;
+            }
+        }
+
+        if (spos.z < near_split.x && spos.z > far_split.y)
+        {
+            lpos = shadow_matrix[1]*spos;
+            
+            float w = 1.0;
+            w -= max(spos.z-far_split.x, 0.0)/transition_domain.x;
+            w -= max(near_split.y-spos.z, 0.0)/transition_domain.y;
+            //w = clamp(w, 0.0, 1.0);
+            float contrib = pcfShadow(shadowMap1, norm, lpos, 1.0, pos_screen, light_dir)*w;
+            //if (contrib > 0)
+            {
+                shadow += contrib;
+                weight += w;
+            }
+        }
+
+        if (spos.z > far_split.x)
+        {
+            lpos = shadow_matrix[0]*spos;
+                            
+            float w = 1.0;
+            w -= max(near_split.x-spos.z, 0.0)/transition_domain.x;
+            //w = clamp(w, 0.0, 1.0);
+            float contrib = pcfShadow(shadowMap0, norm, lpos, 1.0, pos_screen, light_dir)*w;
+            //if (contrib > 0)
+            {
+                shadow += contrib;
+                weight += w;
+            }
+        }
+
+        shadow /= weight;
+    }
+    else
+    {
+        return 1.0f; // lit beyond the far split...
+    }
+    //shadow = min(dp_directional_light,shadow);
+    return shadow;
+}
+
+float sampleSpotShadow(vec3 pos, vec3 norm, int index, vec2 pos_screen)
+{
+    float shadow = 0.0f;
+    pos += norm * spot_shadow_offset;
+
+    vec4 spos = vec4(pos,1.0);
+    if (spos.z > -shadow_clip.w)
+    {   
+        vec4 lpos;
+        
+        vec4 near_split = shadow_clip*-0.75;
+        vec4 far_split = shadow_clip*-1.25;
+        vec4 transition_domain = near_split-far_split;
+        float weight = 0.0;
+
+        {
+            float w = 1.0;
+            w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
+
+            if (index == 0)
+            {        
+                lpos = shadow_matrix[4]*spos;
+                shadow += pcfSpotShadow(shadowMap4, lpos, 0.8, spos.xy)*w;
+            }
+            else
+            {
+                lpos = shadow_matrix[5]*spos;
+                shadow += pcfSpotShadow(shadowMap5, lpos, 0.8, spos.xy)*w;
+            }
+            weight += w;
+            shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
+        }
+
+        shadow /= weight;
+    }
+    else
+    {
+        shadow = 1.0f;
+    }
+    return shadow;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl
index cc77a4cea0..72bd0f0f34 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl
@@ -27,20 +27,19 @@ uniform mat4 modelview_projection_matrix;
 
 ATTRIBUTE vec3 position;
 
-#if !DEPTH_CLAMP
 VARYING vec4 post_pos;
-#endif
 
 void main()
 {
 	//transform vertex
 	vec4 pos = modelview_projection_matrix*vec4(position.xyz, 1.0);
 	
-#if !DEPTH_CLAMP
 	post_pos = pos;
 
+#if !defined(DEPTH_CLAMP)
 	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
 #else
 	gl_Position = pos;
 #endif
+
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/skyF.glsl b/indra/newview/app_settings/shaders/class1/deferred/skyF.glsl
index 22f4729e2e..331249dc33 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/skyF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/skyF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file WLSkyF.glsl
+ * @file class1/deferred/skyF.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
  
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -35,32 +37,28 @@ out vec4 frag_data[3];
 
 VARYING vec4 vary_HazeColor;
 
-uniform sampler2D cloud_noise_texture;
-uniform vec4 gamma;
-
 /// Soft clips the light with a gamma correction
-vec3 scaleSoftClip(vec3 light) {
-	//soft clip effect:
-	light = 1. - clamp(light, vec3(0.), vec3(1.));
-	light = 1. - pow(light, gamma.xxx);
-
-	return light;
-}
+vec3 scaleSoftClip(vec3 light);
+vec3 srgb_to_linear(vec3 c);
 
 void main()
 {
-	// Potential Fill-rate optimization.  Add cloud calculation 
-	// back in and output alpha of 0 (so that alpha culling kills 
-	// the fragment) if the sky wouldn't show up because the clouds 
-	// are fully opaque.
+    // Potential Fill-rate optimization.  Add cloud calculation 
+    // back in and output alpha of 0 (so that alpha culling kills 
+    // the fragment) if the sky wouldn't show up because the clouds 
+    // are fully opaque.
+
+    vec4 color;
+    color = vary_HazeColor;
+
+    color.rgb *= 2.;
+    color.rgb = scaleSoftClip(color.rgb);
 
-	vec4 color;
-	color = vary_HazeColor;
-	color *= 2.;
+    /// Gamma correct for WL (soft clip effect).
+    frag_data[0] = vec4(color.rgb, 0.0);
+    frag_data[1] = vec4(0.0,0.0,0.0,0.0);
+    frag_data[2] = vec4(0.0,0.0,0.0,1.0); //1.0 in norm.w masks off fog
 
-	/// Gamma correct for WL (soft clip effect).
-	frag_data[0] = vec4(scaleSoftClip(color.rgb), 1.0);
-	frag_data[1] = vec4(0.0,0.0,0.0,0.0);
-	frag_data[2] = vec4(0.5,0.5,0.0,1.0); //1.0 in norm.w masks off fog
+    gl_FragDepth = 0.99999f;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
index 7c02d31d43..ead754ec76 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
@@ -39,7 +39,9 @@ uniform vec3 camPosLocal;
 
 uniform vec4 lightnorm;
 uniform vec4 sunlight_color;
-uniform vec4 ambient;
+uniform vec4 moonlight_color;
+uniform int sun_up_factor;
+uniform vec4 ambient_color;
 uniform vec4 blue_horizon;
 uniform vec4 blue_density;
 uniform float haze_horizon;
@@ -47,21 +49,28 @@ uniform float haze_density;
 
 uniform float cloud_shadow;
 uniform float density_multiplier;
+uniform float distance_multiplier;
 uniform float max_y;
 
 uniform vec4 glow;
+uniform float sun_moon_glow_factor;
 
 uniform vec4 cloud_color;
 
+// NOTE: Keep these in sync!
+//       indra\newview\app_settings\shaders\class1\deferred\skyV.glsl
+//       indra\newview\app_settings\shaders\class1\deferred\cloudsV.glsl
+//       indra\newview\lllegacyatmospherics.cpp
 void main()
 {
 
 	// World / view / projection
-	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
+    vec4 pos = modelview_projection_matrix * vec4(position.xyz, 1.0);
+
+	gl_Position = pos;
 	
 	// Get relative position
 	vec3 P = position.xyz - camPosLocal.xyz + vec3(0,50,0);
-	//vec3 P = position.xyz + vec3(0,50,0);
 
 	// Set altitude
 	if (P.y > 0.)
@@ -75,39 +84,40 @@ void main()
 
 	// Can normalize then
 	vec3 Pn = normalize(P);
-	float  Plen = length(P);
+
+	float Plen = length(P);
 
 	// Initialize temp variables
 	vec4 temp1 = vec4(0.);
 	vec4 temp2 = vec4(0.);
 	vec4 blue_weight;
 	vec4 haze_weight;
-	vec4 sunlight = sunlight_color;
+	vec4 sunlight = (sun_up_factor == 1) ? sunlight_color : moonlight_color;
 	vec4 light_atten;
 
+    float dens_mul = density_multiplier;
 
 	// Sunlight attenuation effect (hue and brightness) due to atmosphere
 	// this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (dens_mul * max_y);
 
 	// Calculate relative weights
-	temp1 = blue_density + haze_density;
+	temp1 = abs(blue_density) + vec4(abs(haze_density));
 	blue_weight = blue_density / temp1;
 	haze_weight = haze_density / temp1;
 
 	// Compute sunlight from P & lightnorm (for long rays like sky)
-	temp2.y = max(0., max(0., Pn.y) * 1.0 + lightnorm.y );
-	temp2.y = 1. / temp2.y;
-	sunlight *= exp( - light_atten * temp2.y);
+    temp2.y = max(0., max(0., Pn.y) * 1.0 + lightnorm.y );
+    temp2.y = 1. / temp2.y;
+    sunlight *= exp( - light_atten * temp2.y);
 
 	// Distance
-	temp2.z = Plen * density_multiplier;
+	temp2.z = Plen * dens_mul;
 
 	// Transparency (-> temp1)
-	// ATI Bugfix -- can't store temp1*temp2.z in a variable because the ati
-	// compiler gets confused.
-	temp1 = exp(-temp1 * temp2.z);
-
+    // ATI Bugfix -- can't store temp1*temp2.z in a variable because the ati
+    // compiler gets confused.
+    temp1 = exp(-temp1 * temp2.z);
 
 	// Compute haze glow
 	temp2.x = dot(Pn, lightnorm.xyz);
@@ -123,35 +133,33 @@ void main()
 	// Add "minimum anti-solar illumination"
 	temp2.x += .25;
 
+    vec4 color = (    blue_horizon * blue_weight * (sunlight + ambient_color)
+                + (haze_horizon * haze_weight) * (sunlight * temp2.x + ambient_color)
+             );
 
-	// Haze color above cloud
-	vary_HazeColor = (	  blue_horizon * blue_weight * (sunlight + ambient)
-				+ (haze_horizon * haze_weight) * (sunlight * temp2.x + ambient)
-			 );	
 
+    // Final atmosphere additive
+    color *= (1. - temp1);
 
 	// Increase ambient when there are more clouds
-	vec4 tmpAmbient = ambient;
-	tmpAmbient += (1. - tmpAmbient) * cloud_shadow * 0.5; 
+	vec4 tmpAmbient = ambient_color;
+	tmpAmbient += max(vec4(0), (1. - ambient_color)) * cloud_shadow * 0.5; 
 
 	// Dim sunlight by cloud shadow percentage
-	sunlight *= (1. - cloud_shadow);
+	sunlight *= max(0.0, (1. - cloud_shadow));
 
 	// Haze color below cloud
 	vec4 additiveColorBelowCloud = (	  blue_horizon * blue_weight * (sunlight + tmpAmbient)
 				+ (haze_horizon * haze_weight) * (sunlight * temp2.x + tmpAmbient)
 			 );	
 
-	// Final atmosphere additive
-	vary_HazeColor *= (1. - temp1);
-	
 	// Attenuate cloud color by atmosphere
 	temp1 = sqrt(temp1);	//less atmos opacity (more transparency) below clouds
 
 	// At horizon, blend high altitude sky color towards the darker color below the clouds
-	vary_HazeColor += (additiveColorBelowCloud - vary_HazeColor) * (1. - sqrt(temp1));
-	
-	// won't compile on mac without this being set
-	//vary_AtmosAttenuation = vec3(0.0,0.0,0.0);
+	color += (additiveColorBelowCloud - color) * (1. - sqrt(temp1));
+
+    // Haze color above cloud
+	vary_HazeColor = color;	
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index 03bdb754b5..a5804220bc 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file softenLightF.glsl
+ * @file class1/deferred/softenLightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -36,442 +36,161 @@ out vec4 frag_color;
 
 uniform sampler2DRect diffuseRect;
 uniform sampler2DRect specularRect;
-uniform sampler2DRect positionMap;
 uniform sampler2DRect normalMap;
 uniform sampler2DRect lightMap;
 uniform sampler2DRect depthMap;
 uniform samplerCube environmentMap;
-uniform sampler2D	  lightFunc;
+uniform sampler2D     lightFunc;
 
 uniform float blur_size;
 uniform float blur_fidelity;
 
 // Inputs
-uniform vec4 morphFactor;
-uniform vec3 camPosLocal;
-//uniform vec4 camPosWorld;
-uniform vec4 gamma;
-uniform vec4 lightnorm;
-uniform vec4 sunlight_color;
-uniform vec4 ambient;
-uniform vec4 blue_horizon;
-uniform vec4 blue_density;
-uniform float haze_horizon;
-uniform float haze_density;
-uniform float cloud_shadow;
-uniform float density_multiplier;
-uniform float distance_multiplier;
-uniform float max_y;
-uniform vec4 glow;
-uniform float global_gamma;
-uniform float scene_light_strength;
 uniform mat3 env_mat;
-uniform mat3 ssao_effect_mat;
 
 uniform vec3 sun_dir;
+uniform vec3 moon_dir;
+uniform int sun_up_factor;
 VARYING vec2 vary_fragcoord;
 
-vec3 vary_PositionEye;
-
-vec3 vary_SunlitColor;
-vec3 vary_AmblitColor;
-vec3 vary_AdditiveColor;
-vec3 vary_AtmosAttenuation;
-
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-vec4 getPosition_d(vec2 pos_screen, float depth)
-{
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
-
-vec4 getPosition(vec2 pos_screen)
-{ //get position in screen space (world units) given window coordinate and depth map
-	float depth = texture2DRect(depthMap, pos_screen.xy).a;
-	return getPosition_d(pos_screen, depth);
-}
-
-vec3 getPositionEye()
-{
-	return vary_PositionEye;
-}
-vec3 getSunlitColor()
-{
-	return vary_SunlitColor;
-}
-vec3 getAmblitColor()
-{
-	return vary_AmblitColor;
-}
-vec3 getAdditiveColor()
-{
-	return vary_AdditiveColor;
-}
-vec3 getAtmosAttenuation()
-{
-	return vary_AtmosAttenuation;
-}
-
-void setPositionEye(vec3 v)
-{
-	vary_PositionEye = v;
-}
-
-void setSunlitColor(vec3 v)
-{
-	vary_SunlitColor = v;
-}
-
-void setAmblitColor(vec3 v)
-{
-	vary_AmblitColor = v;
-}
-
-void setAdditiveColor(vec3 v)
-{
-	vary_AdditiveColor = v;
-}
+vec3 getNorm(vec2 pos_screen);
+vec4 getPositionWithDepth(vec2 pos_screen, float depth);
 
-void setAtmosAttenuation(vec3 v)
-{
-	vary_AtmosAttenuation = v;
-}
+void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao);
+float getAmbientClamp();
+vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);
+vec3 scaleSoftClipFrag(vec3 l);
+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
+vec3 fullbrightScaleSoftClip(vec3 light);
 
+vec3 linear_to_srgb(vec3 c);
+vec3 srgb_to_linear(vec3 c);
 
 #ifdef WATER_FOG
-uniform vec4 waterPlane;
-uniform vec4 waterFogColor;
-uniform float waterFogDensity;
-uniform float waterFogKS;
-
-vec4 applyWaterFogDeferred(vec3 pos, vec4 color)
-{
-	//normalize view vector
-	vec3 view = normalize(pos);
-	float es = -(dot(view, waterPlane.xyz));
-
-	//find intersection point with water plane and eye vector
-	
-	//get eye depth
-	float e0 = max(-waterPlane.w, 0.0);
-	
-	vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
-	
-	//get object depth
-	float depth = length(pos - int_v);
-		
-	//get "thickness" of water
-	float l = max(depth, 0.1);
-
-	float kd = waterFogDensity;
-	float ks = waterFogKS;
-	vec4 kc = waterFogColor;
-	
-	float F = 0.98;
-	
-	float t1 = -kd * pow(F, ks * e0);
-	float t2 = kd + ks * es;
-	float t3 = pow(F, t2*l) - 1.0;
-	
-	float L = min(t1/t2*t3, 1.0);
-	
-	float D = pow(0.98, l*kd);
-	
-	color.rgb = color.rgb * D + kc.rgb * L;
-	color.a = kc.a + color.a;
-	
-	return color;
-}
+vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-void calcAtmospherics(vec3 inPositionEye, float ambFactor) {
-
-	vec3 P = inPositionEye;
-	setPositionEye(P);
-	
-	vec3 tmpLightnorm = lightnorm.xyz;
-
-	vec3 Pn = normalize(P);
-	float Plen = length(P);
-
-	vec4 temp1 = vec4(0);
-	vec3 temp2 = vec3(0);
-	vec4 blue_weight;
-	vec4 haze_weight;
-	vec4 sunlight = sunlight_color;
-	vec4 light_atten;
-
-	//sunlight attenuation effect (hue and brightness) due to atmosphere
-	//this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
-		//I had thought blue_density and haze_density should have equal weighting,
-		//but attenuation due to haze_density tends to seem too strong
-
-	temp1 = blue_density + vec4(haze_density);
-	blue_weight = blue_density / temp1;
-	haze_weight = vec4(haze_density) / temp1;
-
-	//(TERRAIN) compute sunlight from lightnorm only (for short rays like terrain)
-	temp2.y = max(0.0, tmpLightnorm.y);
-	temp2.y = 1. / temp2.y;
-	sunlight *= exp( - light_atten * temp2.y);
-
-	// main atmospheric scattering line integral
-	temp2.z = Plen * density_multiplier;
-
-	// Transparency (-> temp1)
-	// ATI Bugfix -- can't store temp1*temp2.z*distance_multiplier in a variable because the ati
-	// compiler gets confused.
-	temp1 = exp(-temp1 * temp2.z * distance_multiplier);
-
-	//final atmosphere attenuation factor
-	setAtmosAttenuation(temp1.rgb);
-	
-	//compute haze glow
-	//(can use temp2.x as temp because we haven't used it yet)
-	temp2.x = dot(Pn, tmpLightnorm.xyz);
-	temp2.x = 1. - temp2.x;
-		//temp2.x is 0 at the sun and increases away from sun
-	temp2.x = max(temp2.x, .03);	//was glow.y
-		//set a minimum "angle" (smaller glow.y allows tighter, brighter hotspot)
-	temp2.x *= glow.x;
-		//higher glow.x gives dimmer glow (because next step is 1 / "angle")
-	temp2.x = pow(temp2.x, glow.z);
-		//glow.z should be negative, so we're doing a sort of (1 / "angle") function
-
-	//add "minimum anti-solar illumination"
-	temp2.x += .25;
-	
-	//increase ambient when there are more clouds
-	vec4 tmpAmbient = ambient + (vec4(1.) - ambient) * cloud_shadow * 0.5;
-	
-	/*  decrease value and saturation (that in HSV, not HSL) for occluded areas
-	 * // for HSV color/geometry used here, see http://gimp-savvy.com/BOOK/index.html?node52.html
-	 * // The following line of code performs the equivalent of:
-	 * float ambAlpha = tmpAmbient.a;
-	 * float ambValue = dot(vec3(tmpAmbient), vec3(0.577)); // projection onto <1/rt(3), 1/rt(3), 1/rt(3)>, the neutral white-black axis
-	 * vec3 ambHueSat = vec3(tmpAmbient) - vec3(ambValue);
-	 * tmpAmbient = vec4(RenderSSAOEffect.valueFactor * vec3(ambValue) + RenderSSAOEffect.saturationFactor *(1.0 - ambFactor) * ambHueSat, ambAlpha);
-	 */
-	tmpAmbient = vec4(mix(ssao_effect_mat * tmpAmbient.rgb, tmpAmbient.rgb, ambFactor), tmpAmbient.a);
-
-	//haze color
-	setAdditiveColor(
-		vec3(blue_horizon * blue_weight * (sunlight*(1.-cloud_shadow) + tmpAmbient)
-	  + (haze_horizon * haze_weight) * (sunlight*(1.-cloud_shadow) * temp2.x
-		  + tmpAmbient)));
-
-	//brightness of surface both sunlight and ambient
-	setSunlitColor(vec3(sunlight * .5));
-	setAmblitColor(vec3(tmpAmbient * .25));
-	setAdditiveColor(getAdditiveColor() * vec3(1.0 - temp1));
-}
-
-vec3 atmosLighting(vec3 light)
-{
-	light *= getAtmosAttenuation().r;
-	light += getAdditiveColor();
-	return (2.0 * light);
-}
-
-vec3 atmosTransport(vec3 light) {
-	light *= getAtmosAttenuation().r;
-	light += getAdditiveColor() * 2.0;
-	return light;
-}
-
-vec3 fullbrightAtmosTransport(vec3 light) {
-	float brightness = dot(light.rgb, vec3(0.33333));
-
-	return mix(atmosTransport(light.rgb), light.rgb + getAdditiveColor().rgb, brightness * brightness);
-}
-
-
-
-vec3 atmosGetDiffuseSunlightColor()
-{
-	return getSunlitColor();
-}
-
-vec3 scaleDownLight(vec3 light)
-{
-	return (light / scene_light_strength );
-}
-
-vec3 scaleUpLight(vec3 light)
-{
-	return (light * scene_light_strength);
-}
-
-vec3 atmosAmbient(vec3 light)
-{
-	return getAmblitColor() + light / 2.0;
-}
-
-vec3 atmosAffectDirectionalLight(float lightIntensity)
-{
-	return getSunlitColor() * lightIntensity;
-}
-
-vec3 scaleSoftClip(vec3 light)
-{
-	//soft clip effect:
-	light = 1. - clamp(light, vec3(0.), vec3(1.));
-	light = 1. - pow(light, gamma.xxx);
-
-	return light;
-}
-
-
-vec3 fullbrightScaleSoftClip(vec3 light)
-{
-	//soft clip effect:
-	return light;
-}
-
 void main() 
 {
-	vec2 tc = vary_fragcoord.xy;
-	float depth = texture2DRect(depthMap, tc.xy).r;
-	vec3 pos = getPosition_d(tc, depth).xyz;
-	vec4 norm = texture2DRect(normalMap, tc);
-	float envIntensity = norm.z;
-	norm.xyz = decode_normal(norm.xy); // unpack norm
-		
-	float da = dot(norm.xyz, sun_dir.xyz);
-
-	float final_da = max(0.0,da);
-          final_da = min(final_da, 1.0f);
-	      final_da = pow(final_da, 1.0/1.3);
-
-	vec4 diffuse = texture2DRect(diffuseRect, tc);
-
-	//convert to gamma space
-	diffuse.rgb = linear_to_srgb(diffuse.rgb);
-
-	vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy);
-	vec3 col;
-	float bloom = 0.0;
-	{
-		calcAtmospherics(pos.xyz, 1.0);
-	
-		col = atmosAmbient(vec3(0));
-		float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0);
-		ambient *= 0.5;
-		ambient *= ambient;
-		ambient = (1.0-ambient);
-
-		col.rgb *= ambient;
-
-		col += atmosAffectDirectionalLight(final_da);	
-	
-		col *= diffuse.rgb;
-	
-		vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
-
-		if (spec.a > 0.0) // specular reflection
-		{
-			// the old infinite-sky shiny reflection
-			//
-			
-			float sa = dot(refnormpersp, sun_dir.xyz);
-			vec3 dumbshiny = vary_SunlitColor*(texture2D(lightFunc, vec2(sa, spec.a)).r);
-			
-			// add the two types of shiny together
-			vec3 spec_contrib = dumbshiny * spec.rgb;
-			bloom = dot(spec_contrib, spec_contrib) / 6;
-			col += spec_contrib;
-		}
-		
-		
-		col = mix(col.rgb, diffuse.rgb, diffuse.a);
-				
-		if (envIntensity > 0.0)
-		{ //add environmentmap
-			vec3 env_vec = env_mat * refnormpersp;
-			
-			
-			vec3 refcol = textureCube(environmentMap, env_vec).rgb;
-
-			col = mix(col.rgb, refcol, 
-				envIntensity);  
-		}
-				
-		if (norm.w < 0.5)
-		{
-			col = mix(atmosLighting(col), fullbrightAtmosTransport(col), diffuse.a);
-			col = mix(scaleSoftClip(col), fullbrightScaleSoftClip(col), diffuse.a);
-		}
-
-		#ifdef WATER_FOG
-			vec4 fogged = applyWaterFogDeferred(pos,vec4(col, bloom));
-			col = fogged.rgb;
-			bloom = fogged.a;
-		#endif
-
-		col = srgb_to_linear(col);
-
-		//col = vec3(1,0,1);
-		//col.g = envIntensity;
-	}
-
-	frag_color.rgb = col.rgb;
-	frag_color.a = bloom;
-}
+    vec2 tc = vary_fragcoord.xy;
+    float depth = texture2DRect(depthMap, tc.xy).r;
+    vec4 pos = getPositionWithDepth(tc, depth);
+    vec4 norm = texture2DRect(normalMap, tc);
+    float envIntensity = norm.z;
+    norm.xyz = getNorm(tc);
+    
+    vec3 light_dir = (sun_up_factor == 1) ? sun_dir : moon_dir;
+    float da = clamp(dot(norm.xyz, light_dir.xyz), 0.0, 1.0);
+    float light_gamma = 1.0/1.3;
+    da = pow(da, light_gamma);
+    
+    vec4 diffuse = texture2DRect(diffuseRect, tc);
+
+    //convert to gamma space
+    //diffuse.rgb = linear_to_srgb(diffuse.rgb);
+
+    vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy);
+    vec3 color = vec3(0);
+    float bloom = 0.0;
+    {
+        float ambocc = 1.0; // no AO...
+
+        vec3 sunlit;
+        vec3 amblit;
+        vec3 additive;
+        vec3 atten;
+    
+        calcAtmosphericVars(pos.xyz, light_dir, ambocc, sunlit, amblit, additive, atten, false);
+
+        color.rgb = amblit;
+
+        float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0);
+        ambient *= 0.5;
+        ambient *= ambient;
+        ambient = (1.0 - ambient);
+
+        color.rgb *= ambient;
+
+        vec3 sun_contrib = da * sunlit;
+
+        color.rgb += sun_contrib;
+
+        color.rgb *= diffuse.rgb;
+
+        vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
+
+        if (spec.a > 0.0) // specular reflection
+        {
+
+#if 1 //EEP
+            vec3 npos = -normalize(pos.xyz);
+
+            //vec3 ref = dot(pos+lv, norm);
+            vec3 h = normalize(light_dir.xyz+npos);
+            float nh = dot(norm.xyz, h);
+            float nv = dot(norm.xyz, npos);
+            float vh = dot(npos, h);
+            float sa = nh;
+            float fres = pow(1 - dot(h, npos), 5)*0.4+0.5;
+
+            float gtdenom = 2 * nh;
+            float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));
+            
+            if (nh > 0.0)
+            {
+                float scontrib = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
+                vec3 sp = sun_contrib*scontrib / 6.0;
+                sp = clamp(sp, vec3(0), vec3(1));
+                bloom += dot(sp, sp) / 4.0;
+                color += sp * spec.rgb;
+            }
+#else //PRODUCTION
+            float sa = dot(refnormpersp, light_dir.xyz);
+            vec3 dumbshiny = sunlit*(texture2D(lightFunc, vec2(sa, spec.a)).r);
+            
+            // add the two types of shiny together
+            vec3 spec_contrib = dumbshiny * spec.rgb;
+            bloom = dot(spec_contrib, spec_contrib) / 6;
+            color.rgb += spec_contrib;
+#endif
 
+        }
+       
+       color.rgb = mix(color.rgb, diffuse.rgb, diffuse.a);
+
+        if (envIntensity > 0.0)
+        { //add environmentmap
+            vec3 env_vec = env_mat * refnormpersp;
+            vec3 reflected_color = textureCube(environmentMap, env_vec).rgb;
+            color = mix(color.rgb, reflected_color, envIntensity);
+        }
+       
+        if (norm.w < 0.5)
+        {
+            color = mix(atmosFragLighting(color, additive, atten), fullbrightAtmosTransportFrag(color, additive, atten), diffuse.a);
+            color = mix(scaleSoftClipFrag(color), fullbrightScaleSoftClip(color), diffuse.a);
+        }
+
+        #ifdef WATER_FOG
+            vec4 fogged = applyWaterFogView(pos.xyz,vec4(color, bloom));
+            color = fogged.rgb;
+            bloom = fogged.a;
+        #endif
+
+    }
+
+// linear debuggables
+//color.rgb = vec3(final_da);
+//color.rgb = vec3(ambient);
+//color.rgb = vec3(scol);
+//color.rgb = diffuse_srgb.rgb;
+
+    // convert to linear as fullscreen lights need to sum in linear colorspace
+    // and will be gamma (re)corrected downstream...
+    
+    frag_color.rgb = srgb_to_linear(color.rgb);
+    frag_color.a = bloom;
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl
index b59fcbe017..8891315e15 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file softenLightF.glsl
+ * @file softenLightV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -29,12 +29,17 @@ ATTRIBUTE vec3 position;
 
 uniform vec2 screen_res;
 
+void setAtmosAttenuation(vec3 c);
+void setAdditiveColor(vec3 c);
+
 VARYING vec2 vary_fragcoord;
 void main()
 {
-	//transform vertex
-	vec4 pos = modelview_projection_matrix * vec4(position.xyz, 1.0);
-	gl_Position = pos; 
-	
-	vary_fragcoord = (pos.xy*0.5+0.5)*screen_res;
+    //transform vertex
+    vec4 pos = modelview_projection_matrix * vec4(position.xyz, 1.0);
+    gl_Position = pos; 
+    // appease OSX GLSL compiler/linker by touching all the varyings we said we would
+    setAtmosAttenuation(vec3(1));
+    setAdditiveColor(vec3(0));
+    vary_fragcoord = (pos.xy*0.5+0.5)*screen_res;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
index f1aec315cc..694b19cdfb 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
@@ -70,64 +70,8 @@ uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
-vec4 correctWithGamma(vec4 col)
-{
-	return vec4(srgb_to_linear(col.rgb), col.a);
-}
+vec3 getNorm(vec2 pos_screen);
+vec3 srgb_to_linear(vec3 c);
 
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 {
@@ -152,7 +96,7 @@ vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 {
 	vec4 ret = texture2DLod(projectionMap, tc, lod);
-	ret = correctWithGamma(ret);
+	ret.rgb = srgb_to_linear(ret.rgb);
 	
 	vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
 	
@@ -170,7 +114,7 @@ vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 {
 	vec4 ret = texture2DLod(projectionMap, tc, lod);
-	ret = correctWithGamma(ret);
+	ret.rgb = srgb_to_linear(ret.rgb);
 	
 	vec2 dist = tc-vec2(0.5);
 	
@@ -181,22 +125,15 @@ vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 	return ret;
 }
 
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
+vec4 getPosition(vec2 pos_screen);
 
 void main() 
 {
+	vec3 col = vec3(0,0,0);
+
+#if defined(LOCAL_LIGHT_KILL)
+    discard;
+#else
 	vec4 frag = vary_fragcoord;
 	frag.xyz /= frag.w;
 	frag.xyz = frag.xyz*0.5+0.5;
@@ -210,12 +147,10 @@ void main()
 	{
 		discard;
 	}
-	
 		
 	vec3 norm = texture2DRect(normalMap, frag.xy).xyz;
 	float envIntensity = norm.z;
-	norm = decode_normal(norm.xy);
-	
+	norm = getNorm(frag.xy);
 	norm = normalize(norm);
 	float l_dist = -dot(lv, proj_n);
 	
@@ -241,13 +176,11 @@ void main()
 	lv = normalize(lv);
 	float da = dot(norm, lv);
 		
-	vec3 col = vec3(0,0,0);
-		
 	vec3 diff_tex = texture2DRect(diffuseRect, frag.xy).rgb;
-		
-	vec4 spec = texture2DRect(specularRect, frag.xy);
+	//light shaders output linear and are gamma corrected later in postDeferredGammaCorrectF.glsl
+    diff_tex.rgb = srgb_to_linear(diff_tex.rgb);
 
-	
+	vec4 spec = texture2DRect(specularRect, frag.xy);
 
 	float noise = texture2D(noiseMap, frag.xy/128.0).b;
 	vec3 dlit = vec3(0, 0, 0);
@@ -284,7 +217,6 @@ void main()
 		amb_da = min(amb_da, 1.0-lit);
 		col += amb_da*color.rgb*diff_tex.rgb*amb_plcol.rgb*amb_plcol.a*diff_tex.rgb;
 	}
-	
 
 	if (spec.a > 0.0)
 	{
@@ -311,7 +243,6 @@ void main()
 		}
 	}	
 
-
 	if (envIntensity > 0.0)
 	{
 		vec3 ref = reflect(normalize(pos), norm);
@@ -340,7 +271,9 @@ void main()
 			}
 		}
 	}
-	
+#endif
+
+	//col.r = 1.0;
 	frag_color.rgb = col;	
 	frag_color.a = 0.0;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl b/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
index 821058804c..bac79a9fdc 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -31,14 +33,35 @@ out vec4 frag_data[3];
 
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
+VARYING vec2 screenpos;
 
 uniform sampler2D diffuseMap;
+uniform sampler2D altDiffuseMap;
+uniform float blend_factor;
+uniform float custom_alpha;
+uniform float time;
+
+float twinkle(){
+    float d = fract(screenpos.x + screenpos.y);
+    return abs(d);
+}
 
 void main() 
 {
-	vec4 col = vertex_color * texture2D(diffuseMap, vary_texcoord0.xy);
-	
-	frag_data[0] = col;
-	frag_data[1] = vec4(0,0,0,0);
-	frag_data[2] = vec4(0,0,1,0);	
+    vec4 col_a = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 col_b = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 col = mix(col_b, col_a, blend_factor);
+    col.rgb *= vertex_color.rgb;
+ 
+    float factor = smoothstep(0.0f, 0.9f, custom_alpha);
+
+    col.a = (col.a * factor) * 32.0f;
+    col.a *= twinkle();
+
+    frag_data[0] = col;
+    frag_data[1] = vec4(0.0f);
+    frag_data[2] = vec4(0.0, 1.0, 0.0, 1.0);
+
+    gl_FragDepth = 0.99995f;
 }
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/starsV.glsl b/indra/newview/app_settings/shaders/class1/deferred/starsV.glsl
index 8bc5b06379..bb2a2ee72b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/starsV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/starsV.glsl
@@ -25,6 +25,7 @@
 
 uniform mat4 texture_matrix0;
 uniform mat4 modelview_projection_matrix;
+uniform float time;
 
 ATTRIBUTE vec3 position;
 ATTRIBUTE vec4 diffuse_color;
@@ -32,11 +33,20 @@ ATTRIBUTE vec2 texcoord0;
 
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
+VARYING vec2 screenpos;
 
 void main()
 {
 	//transform vertex
-	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0); 
+    vec4 pos = modelview_projection_matrix * vec4(position, 1.0);
+
+// bias z to fix SL-9806 and get stars to depth test against clouds
+    pos.z += 0.001f;
+
+	gl_Position = pos;
+
+    float t = mod(time, 1.25f);
+    screenpos = position.xy * vec2(t, t);
 	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
 	vertex_color = diffuse_color;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunDiscF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunDiscF.glsl
new file mode 100644
index 0000000000..454af2a9bc
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunDiscF.glsl
@@ -0,0 +1,68 @@
+/** 
+ * @file sunDiscF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_data[3];
+#else
+#define frag_data gl_FragData
+#endif
+
+vec3 srgb_to_linear(vec3 c);
+vec3 fullbrightAtmosTransport(vec3 light);
+vec3 fullbrightScaleSoftClip(vec3 light);
+
+uniform sampler2D diffuseMap;
+uniform sampler2D altDiffuseMap;
+uniform float blend_factor; // interp factor between sunDisc A/B
+VARYING vec2 vary_texcoord0;
+VARYING float sun_fade;
+
+void main() 
+{
+    vec4 sunDiscA = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 sunDiscB = texture2D(altDiffuseMap, vary_texcoord0.xy);
+    vec4 c     = mix(sunDiscA, sunDiscB, blend_factor);
+
+    c.rgb = srgb_to_linear(c.rgb);
+    c.rgb = clamp(c.rgb, vec3(0), vec3(1));
+    c.rgb = pow(c.rgb, vec3(0.7f));
+
+    //c.rgb = fullbrightAtmosTransport(c.rgb);
+    c.rgb = fullbrightScaleSoftClip(c.rgb);
+
+    // SL-9806 stars poke through
+    //c.a *= sun_fade;
+
+    frag_data[0] = c;
+    frag_data[1] = vec4(0.0f);
+    frag_data[2] = vec4(0.0, 1.0, 0.0, 1.0);
+
+    gl_FragDepth = 0.999988f;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunDiscV.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunDiscV.glsl
new file mode 100644
index 0000000000..0d117c6bc7
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunDiscV.glsl
@@ -0,0 +1,52 @@
+/** 
+ * @file sunDiscV.glsl
+ *
+  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_matrix;
+uniform mat4 modelview_projection_matrix;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec2 texcoord0;
+
+VARYING vec2 vary_texcoord0;
+VARYING float sun_fade;
+
+void calcAtmospherics(vec3 eye_pos);
+
+void main()
+{
+    //transform vertex
+    vec3 offset = vec3(0, 0, 50);
+    vec4 vert = vec4(position.xyz - offset, 1.0);
+    vec4 pos  = modelview_projection_matrix*vert;
+
+    sun_fade = smoothstep(0.3, 1.0, (position.z + 50) / 512.0f);
+
+    gl_Position = pos;
+    
+    calcAtmospherics(pos.xyz);
+
+    vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
index 930255729b..15f141cbe5 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
@@ -35,103 +35,16 @@ out vec4 frag_color;
 
 //class 1 -- no shadow, SSAO only
 
-uniform sampler2DRect depthMap;
 uniform sampler2DRect normalMap;
-uniform sampler2D noiseMap;
-
 
 // Inputs
-uniform float ssao_radius;
-uniform float ssao_max_radius;
-uniform float ssao_factor;
-uniform float ssao_factor_inv;
-
 VARYING vec2 vary_fragcoord;
 
-uniform mat4 inv_proj;
-uniform vec2 screen_res;
-
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
+vec3 getNorm(vec2 pos_screen);
+vec4 getPosition(vec2 pos_screen);
 
 //calculate decreases in ambient lighting when crowded out (SSAO)
-float calcAmbientOcclusion(vec4 pos, vec3 norm)
-{
-	float ret = 1.0;
-	
-	vec2 kern[8];
-	// exponentially (^2) distant occlusion samples spread around origin
-	kern[0] = vec2(-1.0, 0.0) * 0.125*0.125;
-	kern[1] = vec2(1.0, 0.0) * 0.250*0.250;
-	kern[2] = vec2(0.0, 1.0) * 0.375*0.375;
-	kern[3] = vec2(0.0, -1.0) * 0.500*0.500;
-	kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625;
-	kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750;
-	kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875;
-	kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000;
-
-	vec2 pos_screen = vary_fragcoord.xy;
-	vec3 pos_world = pos.xyz;
-	vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy;
-		
-	float angle_hidden = 0.0;
-	int points = 0;
-		
-	float scale = min(ssao_radius / -pos_world.z, ssao_max_radius);
-		
-	// it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations unrolling?)
-	for (int i = 0; i < 8; i++)
-	{
-		vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect);
-		vec3 samppos_world = getPosition(samppos_screen).xyz; 
-			
-		vec3 diff = pos_world - samppos_world;
-		float dist2 = dot(diff, diff);
-			
-		// assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area
-		// --> solid angle shrinking by the square of distance
-		//radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2
-		//(k should vary inversely with # of samples, but this is taken care of later)
-			
-		angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv);
-			
-		// 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" 
-		points = points + int(diff.z > -1.0);
-	}
-		
-	angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
-		
-	ret = (1.0 - (float(points != 0) * angle_hidden));
-	
-	return min(ret, 1.0);
-}
+float calcAmbientOcclusion(vec4 pos, vec3 norm, vec2 pos_screen);
 
 void main() 
 {
@@ -139,13 +52,11 @@ void main()
 	
 	//try doing an unproject here
 	
-	vec4 pos = getPosition(pos_screen);
-	
-	vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
-	norm = decode_normal(norm.xy);
-		
+	vec4 pos  = getPosition(pos_screen);
+	vec3 norm = getNorm(pos_screen);
+
 	frag_color[0] = 1.0;
-	frag_color[1] = calcAmbientOcclusion(pos, norm);
+	frag_color[1] = calcAmbientOcclusion(pos, norm, pos_screen);
 	frag_color[2] = 1.0; 
 	frag_color[3] = 1.0;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/terrainF.glsl b/indra/newview/app_settings/shaders/class1/deferred/terrainF.glsl
index 52a429465f..6b6eed9db8 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/terrainF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/terrainF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file terrainF.glsl
+ * @file class1\deferred\terrainF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
  
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -35,33 +37,32 @@ uniform sampler2D detail_2;
 uniform sampler2D detail_3;
 uniform sampler2D alpha_ramp;
 
+VARYING vec3 pos;
 VARYING vec3 vary_normal;
 VARYING vec4 vary_texcoord0;
 VARYING vec4 vary_texcoord1;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main()
 {
-	/// Note: This should duplicate the blending functionality currently used for the terrain rendering.
-	
-	vec4 color0 = texture2D(detail_0, vary_texcoord0.xy);
-	vec4 color1 = texture2D(detail_1, vary_texcoord0.xy);
-	vec4 color2 = texture2D(detail_2, vary_texcoord0.xy);
-	vec4 color3 = texture2D(detail_3, vary_texcoord0.xy);
+    /// Note: This should duplicate the blending functionality currently used for the terrain rendering.
+    
+    vec4 color0 = texture2D(detail_0, vary_texcoord0.xy);
+    vec4 color1 = texture2D(detail_1, vary_texcoord0.xy);
+    vec4 color2 = texture2D(detail_2, vary_texcoord0.xy);
+    vec4 color3 = texture2D(detail_3, vary_texcoord0.xy);
 
-	float alpha1 = texture2D(alpha_ramp, vary_texcoord0.zw).a;
-	float alpha2 = texture2D(alpha_ramp,vary_texcoord1.xy).a;
-	float alphaFinal = texture2D(alpha_ramp, vary_texcoord1.zw).a;
-	vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
-	
-	frag_data[0] = vec4(outColor.rgb, 0.0);
-	frag_data[1] = vec4(0,0,0,0);
-	vec3 nvn = normalize(vary_normal);
-	frag_data[2] = vec4(encode_normal(nvn.xyz), 0.0, 0.0);
+    float alpha1 = texture2D(alpha_ramp, vary_texcoord0.zw).a;
+    float alpha2 = texture2D(alpha_ramp,vary_texcoord1.xy).a;
+    float alphaFinal = texture2D(alpha_ramp, vary_texcoord1.zw).a;
+    vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
+   
+    outColor.a = 0.0; // yes, downstream atmospherics 
+    
+    frag_data[0] = outColor;
+    frag_data[1] = vec4(0.0,0.0,0.0,-1.0);
+    vec3 nvn = normalize(vary_normal);
+    frag_data[2] = vec4(encode_normal(nvn.xyz), 0.0, 0.0);
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/terrainV.glsl b/indra/newview/app_settings/shaders/class1/deferred/terrainV.glsl
index 5effee4e4e..f42cb6ff6d 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/terrainV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/terrainV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file terrainV.glsl
+ * @file class1\environment\terrainV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -33,8 +33,8 @@ ATTRIBUTE vec4 diffuse_color;
 ATTRIBUTE vec2 texcoord0;
 ATTRIBUTE vec2 texcoord1;
 
+VARYING vec3 pos;
 VARYING vec3 vary_normal;
-
 VARYING vec4 vary_texcoord0;
 VARYING vec4 vary_texcoord1;
 
@@ -43,31 +43,35 @@ uniform vec4 object_plane_t;
 
 vec4 texgen_object(vec4  vpos, vec4 tc, mat4 mat, vec4 tp0, vec4 tp1)
 {
-	vec4 tcoord;
-	
-	tcoord.x = dot(vpos, tp0);
-	tcoord.y = dot(vpos, tp1);
-	tcoord.z = tc.z;
-	tcoord.w = tc.w;
-	
-	tcoord = mat * tcoord; 
-	
-	return tcoord; 
+    vec4 tcoord;
+    
+    tcoord.x = dot(vpos, tp0);
+    tcoord.y = dot(vpos, tp1);
+    tcoord.z = tc.z;
+    tcoord.w = tc.w;
+    
+    tcoord = mat * tcoord; 
+    
+    return tcoord; 
 }
 
 void main()
 {
-	//transform vertex
-	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
-			
-	vary_normal = normalize(normal_matrix * normal);
-	
-	// Transform and pass tex coords
- 	vary_texcoord0.xy = texgen_object(vec4(position, 1.0), vec4(texcoord0,0,1), texture_matrix0, object_plane_s, object_plane_t).xy;
-	
-	vec4 t = vec4(texcoord1,0,1);
-	
-	vary_texcoord0.zw = t.xy;
-	vary_texcoord1.xy = t.xy-vec2(2.0, 0.0);
-	vary_texcoord1.zw = t.xy-vec2(1.0, 0.0);
+    //transform vertex
+    vec4 pre_pos = vec4(position.xyz, 1.0);
+    vec4 t_pos = modelview_projection_matrix * pre_pos;
+
+    gl_Position = t_pos;
+    pos = t_pos.xyz;
+
+    vary_normal = normalize(normal_matrix * normal);
+    
+    // Transform and pass tex coords
+    vary_texcoord0.xy = texgen_object(vec4(position, 1.0), vec4(texcoord0,0,1), texture_matrix0, object_plane_s, object_plane_t).xy;
+    
+    vec4 t = vec4(texcoord1,0,1);
+    
+    vary_texcoord0.zw = t.xy;
+    vary_texcoord1.xy = t.xy-vec2(2.0, 0.0);
+    vary_texcoord1.zw = t.xy-vec2(1.0, 0.0);
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/treeF.glsl b/indra/newview/app_settings/shaders/class1/deferred/treeF.glsl
index 808750496f..89e354558a 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/treeF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/treeF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -37,11 +39,7 @@ VARYING vec2 vary_texcoord0;
 
 uniform float minimum_alpha;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl
index d4d2f5f571..e34d75ba1d 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
diff --git a/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl b/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
index 78f841c733..9a5debb3c1 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
@@ -23,6 +23,8 @@
  * $/LicenseInfo$
  */
  
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -56,84 +58,7 @@ VARYING vec4 refCoord;
 VARYING vec4 littleWave;
 VARYING vec4 view;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec4 applyWaterFog(vec4 color, vec3 viewVec)
-{
-	//normalize view vector
-	vec3 view = normalize(viewVec);
-	float es = -view.z;
-
-	//find intersection point with water plane and eye vector
-	
-	//get eye depth
-	float e0 = max(-waterPlane.w, 0.0);
-	
-	//get object depth
-	float depth = length(viewVec);
-		
-	//get "thickness" of water
-	float l = max(depth, 0.1);
-
-	float kd = waterFogDensity;
-	float ks = waterFogKS;
-	vec4 kc = waterFogColor;
-	
-	float F = 0.98;
-	
-	float t1 = -kd * pow(F, ks * e0);
-	float t2 = kd + ks * es;
-	float t3 = pow(F, t2*l) - 1.0;
-	
-	float L = min(t1/t2*t3, 1.0);
-	
-	float D = pow(0.98, l*kd);
-	//return vec4(1.0, 0.0, 1.0, 1.0);
-	return color * D + kc * L;
-	//depth /= 10.0;
-	//return vec4(depth,depth,depth,0.0);
-}
+vec2 encode_normal(vec3 n);
 
 void main() 
 {
@@ -151,7 +76,7 @@ void main()
 		
 	vec4 fb = texture2D(screenTex, distort);
 
-	frag_data[0] = vec4(linear_to_srgb(fb.rgb), 1.0); // diffuse
+	frag_data[0] = vec4(fb.rgb, 1.0); // diffuse
 	frag_data[1] = vec4(0.5,0.5,0.5, 0.95); // speccolor*spec, spec
-	frag_data[2] = vec4(encode_normal(wavef), 0.0, 0.0); // normalxyz, displace
+	frag_data[2] = vec4(encode_normal(wavef), 0.0, 0.0); // normalxyz, env intens, atmo kill
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
index 37dcd3ad34..a157e9c017 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file waterF.glsl
+ * @file class1/deferred/waterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -37,17 +37,10 @@ vec3 scaleSoftClip(vec3 inColor);
 vec3 atmosTransport(vec3 inColor);
 
 uniform sampler2D bumpMap;   
+uniform sampler2D bumpMap2;
+uniform float blend_factor;
 uniform sampler2D screenTex;
 uniform sampler2D refTex;
-uniform sampler2DRectShadow shadowMap0;
-uniform sampler2DRectShadow shadowMap1;
-uniform sampler2DRectShadow shadowMap2;
-uniform sampler2DRectShadow shadowMap3;
-uniform sampler2D noiseMap;
-
-uniform mat4 shadow_matrix[6];
-uniform vec4 shadow_clip;
-
 uniform float sunAngle;
 uniform float sunAngle2;
 uniform vec3 lightDir;
@@ -62,6 +55,7 @@ uniform float fresnelOffset;
 uniform float blurMultiplier;
 uniform vec2 screen_res;
 uniform mat4 norm_mat; //region space to screen space
+uniform int water_edge;
 
 //bigWave is (refCoord.w, view.w);
 VARYING vec4 refCoord;
@@ -69,111 +63,89 @@ VARYING vec4 littleWave;
 VARYING vec4 view;
 VARYING vec4 vary_position;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec2 encode_normal(vec3 n);
+vec3 scaleSoftClip(vec3 l);
+vec3 srgb_to_linear(vec3 c);
+vec3 linear_to_srgb(vec3 c);
 
-vec2 encode_normal(vec3 n)
+vec3 BlendNormal(vec3 bump1, vec3 bump2)
 {
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
+    vec3 n = mix(bump1, bump2, blend_factor);
+    return n;
 }
 
 void main() 
 {
-	vec4 color;
-	float dist = length(view.xy);
-	
-	//normalize view vector
-	vec3 viewVec = normalize(view.xyz);
-	
-	//get wave normals
-	vec3 wave1 = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0-1.0;
-	vec3 wave2 = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
-	vec3 wave3 = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;
-	//get base fresnel components	
-	
-	vec3 df = vec3(
-					dot(viewVec, wave1),
-					dot(viewVec, (wave2 + wave3) * 0.5),
-					dot(viewVec, wave3)
-				 ) * fresnelScale + fresnelOffset;
-	df *= df;
-		    
-	vec2 distort = (refCoord.xy/refCoord.z) * 0.5 + 0.5;
-	
-	float dist2 = dist;
-	dist = max(dist, 5.0);
-	
-	float dmod = sqrt(dist);
-	
-	vec2 dmod_scale = vec2(dmod*dmod, dmod);
-	
-	//get reflected color
-	vec2 refdistort1 = wave1.xy*normScale.x;
-	vec2 refvec1 = distort+refdistort1/dmod_scale;
-	vec4 refcol1 = texture2D(refTex, refvec1);
-	
-	vec2 refdistort2 = wave2.xy*normScale.y;
-	vec2 refvec2 = distort+refdistort2/dmod_scale;
-	vec4 refcol2 = texture2D(refTex, refvec2);
-	
-	vec2 refdistort3 = wave3.xy*normScale.z;
-	vec2 refvec3 = distort+refdistort3/dmod_scale;
-	vec4 refcol3 = texture2D(refTex, refvec3);
-
-	vec4 refcol = refcol1 + refcol2 + refcol3;
-	float df1 = df.x + df.y + df.z;
+    vec4 color;
+    float dist = length(view.xyz);
+    
+    //normalize view vector
+    vec3 viewVec = normalize(view.xyz);
+    
+    //get wave normals
+    vec3 wave1_a = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0-1.0;
+    vec3 wave2_a = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
+    vec3 wave3_a = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;
+
+
+    vec3 wave1_b = texture2D(bumpMap2, vec2(refCoord.w, view.w)).xyz*2.0-1.0;
+    vec3 wave2_b = texture2D(bumpMap2, littleWave.xy).xyz*2.0-1.0;
+    vec3 wave3_b = texture2D(bumpMap2, littleWave.zw).xyz*2.0-1.0;
+
+    vec3 wave1 = BlendNormal(wave1_a, wave1_b);
+    vec3 wave2 = BlendNormal(wave2_a, wave2_b);
+    vec3 wave3 = BlendNormal(wave3_a, wave3_b);
+
+    //get base fresnel components   
+    
+    vec3 df = vec3(
+                    dot(viewVec, wave1),
+                    dot(viewVec, (wave2 + wave3) * 0.5),
+                    dot(viewVec, wave3)
+                 ) * fresnelScale + fresnelOffset;
+    df *= df;
+            
+    vec2 distort = (refCoord.xy/refCoord.z) * 0.5 + 0.5;
+    
+    float dist2 = dist;
+    dist = max(dist, 5.0);
+    
+    float dmod = sqrt(dist);
+    
+    vec2 dmod_scale = vec2(dmod*dmod, dmod);
+    
+    //get reflected color
+    vec2 refdistort1 = wave1.xy*normScale.x;
+    vec2 refvec1 = distort+refdistort1/dmod_scale;
+    vec4 refcol1 = texture2D(refTex, refvec1);
+    
+    vec2 refdistort2 = wave2.xy*normScale.y;
+    vec2 refvec2 = distort+refdistort2/dmod_scale;
+    vec4 refcol2 = texture2D(refTex, refvec2);
+    
+    vec2 refdistort3 = wave3.xy*normScale.z;
+    vec2 refvec3 = distort+refdistort3/dmod_scale;
+    vec4 refcol3 = texture2D(refTex, refvec3);
+
+    vec4 refcol = refcol1 + refcol2 + refcol3;
+    float df1 = df.x + df.y + df.z;
 	refcol *= df1 * 0.333;
-	
-	vec3 wavef = (wave1 + wave2 * 0.4 + wave3 * 0.6) * 0.5;
-	wavef.z *= max(-viewVec.z, 0.1);
-	wavef = normalize(wavef);
-	
-	float df2 = dot(viewVec, wavef) * fresnelScale+fresnelOffset;
-	
-	vec2 refdistort4 = wavef.xy*0.125;
-	refdistort4.y -= abs(refdistort4.y);
-	vec2 refvec4 = distort+refdistort4/dmod;
-	float dweight = min(dist2*blurMultiplier, 1.0);
-	vec4 baseCol = texture2D(refTex, refvec4);
-
-	refcol = mix(baseCol*df2, refcol, dweight);
-
-	//get specular component
+    
+    vec3 wavef = (wave1 + wave2 * 0.4 + wave3 * 0.6) * 0.5;
+    wavef.z *= max(-viewVec.z, 0.1);
+    wavef = normalize(wavef);
+    
+    float df2 = dot(viewVec, wavef) * fresnelScale+fresnelOffset;
+    
+    vec2 refdistort4 = wavef.xy*0.125;
+    refdistort4.y -= abs(refdistort4.y);
+    vec2 refvec4 = distort+refdistort4/dmod;
+    float dweight = min(dist2*blurMultiplier, 1.0);
+    vec4 baseCol = texture2D(refTex, refvec4);
+
+    refcol = mix(baseCol*df2, refcol, dweight);
+
+    //get specular component
 	float spec = clamp(dot(lightDir, (reflect(viewVec,wavef))),0.0,1.0);
 		
 	//harden specular
@@ -186,19 +158,27 @@ void main()
 	
 	//mix with reflection
 	// Note we actually want to use just df1, but multiplying by 0.999999 gets around an nvidia compiler bug
-	color.rgb = mix(fb.rgb, refcol.rgb, df1 * 0.99999);
+	color.rgb = mix(fb.rgb, refcol.rgb, df1 * 0.99999f);
 	
 	vec4 pos = vary_position;
 	
 	color.rgb += spec * specular;
-	
+
 	color.rgb = atmosTransport(color.rgb);
 	color.rgb = scaleSoftClip(color.rgb);
+    
 	color.a   = spec * sunAngle2;
-
+    
 	vec3 screenspacewavef = normalize((norm_mat*vec4(wavef, 1.0)).xyz);
-	
-	frag_data[0] = vec4(color.rgb, color); // diffuse
-	frag_data[1] = vec4(0);		// speccolor, spec
-	frag_data[2] = vec4(encode_normal(screenspacewavef.xyz*0.5+0.5), 0.05, 0);// normalxy, 0, 0
+
+	//frag_data[0] = color;
+
+    // TODO: The non-obvious assignment below is copied from the pre-EEP WL shader code
+    //       Unfortunately, fixing it causes a mismatch for EEP, and so it remains...  for now
+    //       SL-12975 (unfix pre-EEP broken alpha)
+    frag_data[0] = vec4(color.rgb, color);  // Effectively, color.rgbr
+
+
+    frag_data[1] = vec4(0);		// speccolor, spec
+	frag_data[2] = vec4(encode_normal(screenspacewavef.xyz), 0.05, 0);// normalxy, 0, 0
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl b/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl
index 9734acf005..8863869e44 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl
@@ -31,8 +31,8 @@ ATTRIBUTE vec3 position;
 
 void calcAtmospherics(vec3 inPositionEye);
 
-uniform vec2 d1;
-uniform vec2 d2;
+uniform vec2 waveDir1;
+uniform vec2 waveDir2;
 uniform float time;
 uniform vec3 eyeVec;
 uniform float waterHeight;
@@ -88,10 +88,10 @@ void main()
 	calcAtmospherics(pos.xyz);
 		
 	//pass wave parameters to pixel shader
-	vec2 bigWave =  (v.xy) * vec2(0.04,0.04)  + d1 * time * 0.055;
+	vec2 bigWave =  (v.xy) * vec2(0.04,0.04)  + waveDir1 * time * 0.055;
 	//get two normal map (detail map) texture coordinates
-	littleWave.xy = (v.xy) * vec2(0.45, 0.9)   + d2 * time * 0.13;
-	littleWave.zw = (v.xy) * vec2(0.1, 0.2) + d1 * time * 0.1;
+	littleWave.xy = (v.xy) * vec2(0.45, 0.9)   + waveDir2 * time * 0.13;
+	littleWave.zw = (v.xy) * vec2(0.1, 0.2) + waveDir1 * time * 0.1;
 	view.w = bigWave.y;
 	refCoord.w = bigWave.x;
 	
diff --git a/indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl b/indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl
new file mode 100644
index 0000000000..50e781fa78
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/environment/encodeNormF.glsl
@@ -0,0 +1,31 @@
+/**
+ * @file encodeNormF.glsl
+ *
+ * $LicenseInfo:firstyear=2018&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2018, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+vec2 encode_normal(vec3 n)
+{
+	float f = sqrt(8 * n.z + 8);
+	return n.xy / f + 0.5;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/srgb_mac.glsl b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
index 6cc1e6e798..4a8b892c3a 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/srgb_mac.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file srgb.glsl
+ * @file srgbF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -27,14 +27,18 @@ vec3 srgb_to_linear(vec3 cs)
 {
 	vec3 low_range = cs / vec3(12.92);
 	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-
 	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
 
+#ifdef OLD_SELECT
 	vec3 result;
 	result.r = lte.r ? low_range.r : high_range.r;
 	result.g = lte.g ? low_range.g : high_range.g;
 	result.b = lte.b ? low_range.b : high_range.b;
     return result;
+#else
+	return mix(high_range, low_range, lte);
+#endif
+
 }
 
 vec3 linear_to_srgb(vec3 cl)
@@ -42,13 +46,39 @@ vec3 linear_to_srgb(vec3 cl)
 	cl = clamp(cl, vec3(0), vec3(1));
 	vec3 low_range  = cl * 12.92;
 	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-
 	bvec3 lt = lessThan(cl,vec3(0.0031308));
 
+#ifdef OLD_SELECT
 	vec3 result;
 	result.r = lt.r ? low_range.r : high_range.r;
 	result.g = lt.g ? low_range.g : high_range.g;
 	result.b = lt.b ? low_range.b : high_range.b;
-	return result;
+    return result;
+#else
+	return mix(high_range, low_range, lt);
+#endif
+
+}
+
+vec3 ColorFromRadiance(vec3 radiance)
+{
+    return vec3(1.0) - exp(-radiance * 0.0001);
 }
 
+vec3 rgb2hsv(vec3 c)
+{
+    vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
+    vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
+    vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
+
+    float d = q.x - min(q.w, q.y);
+    float e = 1.0e-10;
+    return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
+}
+
+vec3 hsv2rgb(vec3 c)
+{
+    vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+    vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+    return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+}
diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
index 668a710c04..6b68ed4169 100644
--- a/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
@@ -1,5 +1,5 @@
 /**
- * @file terrainF.glsl
+ * @file class1\environment\terrainF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl
index 4d6f0c67a5..ef27848d37 100644
--- a/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl
@@ -1,5 +1,5 @@
 /**
- * @file terrainV.glsl
+ * @file class1\environment\terrainV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -35,6 +35,7 @@ ATTRIBUTE vec3 position;
 ATTRIBUTE vec3 normal;
 ATTRIBUTE vec2 texcoord0;
 ATTRIBUTE vec2 texcoord1;
+ATTRIBUTE vec4 diffuse_color;
 
 VARYING vec4 vertex_color;
 VARYING vec4 vary_texcoord0;
@@ -42,7 +43,7 @@ VARYING vec4 vary_texcoord1;
 
 void calcAtmospherics(vec3 inPositionEye);
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 
 vec4 texgen_object(vec4  vpos, vec4 tc, mat4 mat, vec4 tp0, vec4 tp1)
 {
@@ -71,7 +72,7 @@ void main()
 	/// Potentially better without it for water.
 	pos /= pos.w;
 
-	vec4 color = calcLighting(pos.xyz, norm, vec4(1), vec4(0));
+	vec4 color = calcLighting(pos.xyz, norm, /*diffuse_color*/vec4(1));
 	
 	vertex_color = color;
 
diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl
index a956562396..e53bb46177 100644
--- a/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl
@@ -1,5 +1,5 @@
 /**
- * @file terrainWaterF.glsl
+ * @file class1\environment\terrainWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -64,4 +64,3 @@ void main()
 	outColor = applyWaterFog(outColor);
 	frag_color = outColor;
 }
-
diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainWaterV.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainWaterV.glsl
new file mode 100644
index 0000000000..a075cfeef2
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainWaterV.glsl
@@ -0,0 +1,84 @@
+/**
+ * @file class1\environment\terrainV.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat3 normal_matrix;
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_matrix;
+uniform mat4 modelview_projection_matrix;
+
+uniform vec4 object_plane_t;
+uniform vec4 object_plane_s;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec3 normal;
+ATTRIBUTE vec2 texcoord0;
+ATTRIBUTE vec2 texcoord1;
+ATTRIBUTE vec4 diffuse_color;
+
+VARYING vec4 vertex_color;
+VARYING vec4 vary_texcoord0;
+VARYING vec4 vary_texcoord1;
+
+void calcAtmospherics(vec3 inPositionEye);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
+
+vec4 texgen_object(vec4  vpos, vec4 tc, mat4 mat, vec4 tp0, vec4 tp1)
+{
+	vec4 tcoord;
+	
+	tcoord.x = dot(vpos, tp0);
+	tcoord.y = dot(vpos, tp1);
+	tcoord.z = tc.z;
+	tcoord.w = tc.w;
+	
+	tcoord = mat * tcoord; 
+	
+	return tcoord; 
+}
+
+void main()
+{
+	//transform vertex
+	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
+
+	vec4 pos = modelview_matrix * vec4(position.xyz, 1.0);
+	vec3 norm = normalize(normal_matrix * normal);
+
+	calcAtmospherics(pos.xyz);
+
+	vec4 color = calcLighting(pos.xyz, norm, vec4(1.0));
+
+	vertex_color.rgb = color.rgb;
+
+	// Transform and pass tex coords
+ 	vary_texcoord0.xy = texgen_object(vec4(position.xyz, 1.0), vec4(texcoord0,0,1), texture_matrix0, object_plane_s, object_plane_t).xy;
+	
+	vec4 t = vec4(texcoord1,0,1);
+	
+	vary_texcoord0.zw = t.xy;
+	vary_texcoord1.xy = t.xy-vec2(2.0, 0.0);
+	vary_texcoord1.zw = t.xy-vec2(1.0, 0.0);
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl b/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl
index 0d8dab0a41..8c8bd6d0d5 100644
--- a/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl
@@ -1,5 +1,5 @@
 /**
- * @file underWaterF.glsl
+ * @file class1\environment\underWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -47,7 +47,6 @@ uniform float kd;
 uniform vec4 waterPlane;
 uniform vec3 eyeVec;
 uniform vec4 waterFogColor;
-uniform float waterFogDensity;
 uniform float waterFogKS;
 uniform vec2 screenRes;
 
@@ -56,41 +55,7 @@ VARYING vec4 refCoord;
 VARYING vec4 littleWave;
 VARYING vec4 view;
 
-vec4 applyWaterFog(vec4 color, vec3 viewVec)
-{
-	//normalize view vector
-	vec3 view = normalize(viewVec);
-	float es = -view.z;
-
-	//find intersection point with water plane and eye vector
-	
-	//get eye depth
-	float e0 = max(-waterPlane.w, 0.0);
-	
-	//get object depth
-	float depth = length(viewVec);
-		
-	//get "thickness" of water
-	float l = max(depth, 0.1);
-
-	float kd = waterFogDensity;
-	float ks = waterFogKS;
-	vec4 kc = waterFogColor;
-	
-	float F = 0.98;
-	
-	float t1 = -kd * pow(F, ks * e0);
-	float t2 = kd + ks * es;
-	float t3 = pow(F, t2*l) - 1.0;
-	
-	float L = min(t1/t2*t3, 1.0);
-	
-	float D = pow(0.98, l*kd);
-	//return vec4(1.0, 0.0, 1.0, 1.0);
-	return color * D + kc * L;
-	//depth /= 10.0;
-	//return vec4(depth,depth,depth,0.0);
-}
+vec4 applyWaterFogView(vec3 pos, vec4 color);
 
 void main() 
 {
@@ -108,5 +73,5 @@ void main()
 		
 	vec4 fb = texture2D(screenTex, distort);
 	
-	frag_color = applyWaterFog(fb,view.xyz);
+	frag_color = applyWaterFogView(view.xyz, fb);
 }
diff --git a/indra/newview/app_settings/shaders/class1/environment/waterF.glsl b/indra/newview/app_settings/shaders/class1/environment/waterF.glsl
index 79bffab745..d370997123 100644
--- a/indra/newview/app_settings/shaders/class1/environment/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/waterF.glsl
@@ -32,7 +32,9 @@ out vec4 frag_color;
 vec3 scaleSoftClip(vec3 inColor);
 vec3 atmosTransport(vec3 inColor);
 
-uniform sampler2D bumpMap;   
+uniform sampler2D bumpMap;
+uniform sampler2D bumpMap2;
+uniform float     blend_factor;
 uniform sampler2D screenTex;
 uniform sampler2D refTex;
 
@@ -55,6 +57,13 @@ VARYING vec4 refCoord;
 VARYING vec4 littleWave;
 VARYING vec4 view;
 
+vec3 BlendNormal(vec3 bump1, vec3 bump2)
+{
+    vec3 n = mix(bump1, bump2, blend_factor);
+    return n;
+}
+
+
 void main() 
 {
 	vec4 color;
@@ -65,9 +74,21 @@ void main()
 	vec3 viewVec = normalize(view.xyz);
 	
 	//get wave normals
-	vec3 wave1 = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0-1.0;
-	vec3 wave2 = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
-	vec3 wave3 = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;
+    vec2 bigwave = vec2(refCoord.w, view.w);
+    vec3 wave1_a = texture2D(bumpMap, bigwave      ).xyz*2.0-1.0;
+    vec3 wave2_a = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
+    vec3 wave3_a = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;
+
+
+    vec3 wave1_b = texture2D(bumpMap2, bigwave      ).xyz*2.0-1.0;
+    vec3 wave2_b = texture2D(bumpMap2, littleWave.xy).xyz*2.0-1.0;
+    vec3 wave3_b = texture2D(bumpMap2, littleWave.zw).xyz*2.0-1.0;
+
+    vec3 wave1 = BlendNormal(wave1_a, wave1_b);
+    vec3 wave2 = BlendNormal(wave2_a, wave2_b);
+    vec3 wave3 = BlendNormal(wave3_a, wave3_b);
+
+
 	//get base fresnel components	
 	
 	vec3 df = vec3(
@@ -136,6 +157,12 @@ void main()
 	color.rgb = atmosTransport(color.rgb);
 	color.rgb = scaleSoftClip(color.rgb);
 	color.a = spec * sunAngle2;
-
+	
 	frag_color = color;
+
+#if defined(WATER_EDGE)
+    gl_FragDepth = 0.9999847f;
+#endif
+	
 }
+
diff --git a/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl b/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl
index 4bdfce9260..df640cba05 100644
--- a/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl
@@ -1,5 +1,5 @@
 /**
- * @file waterFogF.glsl
+ * @file class1\environment\waterFogF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -25,7 +25,6 @@
  
 
 
-uniform vec4 lightnorm;
 uniform vec4 waterPlane;
 uniform vec4 waterFogColor;
 uniform float waterFogDensity;
@@ -33,42 +32,48 @@ uniform float waterFogKS;
 
 vec3 getPositionEye();
 
-vec4 applyWaterFog(vec4 color)
+vec4 applyWaterFogView(vec3 pos, vec4 color)
 {
-	//normalize view vector
-	vec3 view = normalize(getPositionEye());
-	float es = -(dot(view, waterPlane.xyz));
+    vec3 view = normalize(pos);
+    //normalize view vector
+    float es = -(dot(view, waterPlane.xyz));
+
+    //find intersection point with water plane and eye vector
+    
+    //get eye depth
+    float e0 = max(-waterPlane.w, 0.0);
+    
+    vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
+    
+    //get object depth
+    float depth = length(pos - int_v);
+        
+    //get "thickness" of water
+    float l = max(depth, 0.1);
+
+    float kd = waterFogDensity;
+    float ks = waterFogKS;
+    vec4 kc = waterFogColor;
+    
+    float F = 0.98;
+    
+    float t1 = -kd * pow(F, ks * e0);
+    float t2 = kd + ks * es;
+    float t3 = pow(F, t2*l) - 1.0;
+    
+    float L = min(t1/t2*t3, 1.0);
+    
+    float D = pow(0.98, l*kd);
+    
+    color.rgb = color.rgb * D + kc.rgb * L;
+    color.a = kc.a + color.a;
 
-	//find intersection point with water plane and eye vector
-	
-	//get eye depth
-	float e0 = max(-waterPlane.w, 0.0);
-	
-	vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
-	
-	//get object depth
-	float depth = length(getPositionEye() - int_v);
-		
-	//get "thickness" of water
-	float l = max(depth, 0.1);
+    return color;
+}
 
-	float kd = waterFogDensity;
-	float ks = waterFogKS;
-	vec4 kc = waterFogColor;
-	
-	float F = 0.98;
-	
-	float t1 = -kd * pow(F, ks * e0);
-	float t2 = kd + ks * es;
-	float t3 = pow(F, t2*l) - 1.0;
-	
-	float L = min(t1/t2*t3, 1.0);
-	
-	float D = pow(0.98, l*kd);
-	
-	color.rgb = color.rgb * D + kc.rgb * L;
-	color.a = kc.a + color.a;
-	
-	return color;
+vec4 applyWaterFog(vec4 color)
+{
+    //normalize view vector
+    return applyWaterFogView(getPositionEye(), color);
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/environment/waterV.glsl b/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
index 352cea7aaa..cc41e3f740 100644
--- a/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file waterV.glsl
+ * @file class1\environment\waterV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -31,8 +31,8 @@ ATTRIBUTE vec3 position;
 
 void calcAtmospherics(vec3 inPositionEye);
 
-uniform vec2 d1;
-uniform vec2 d2;
+uniform vec2 waveDir1;
+uniform vec2 waveDir2;
 uniform float time;
 uniform vec3 eyeVec;
 uniform float waterHeight;
@@ -86,10 +86,10 @@ void main()
 	
 	
 	//pass wave parameters to pixel shader
-	vec2 bigWave =  (v.xy) * vec2(0.04,0.04)  + d1 * time * 0.055;
+	vec2 bigWave =  (v.xy) * vec2(0.04,0.04)  + waveDir1 * time * 0.055;
 	//get two normal map (detail map) texture coordinates
-	littleWave.xy = (v.xy) * vec2(0.45, 0.9)   + d2 * time * 0.13;
-	littleWave.zw = (v.xy) * vec2(0.1, 0.2) + d1 * time * 0.1;
+	littleWave.xy = (v.xy) * vec2(0.45, 0.9)   + waveDir2 * time * 0.13;
+	littleWave.zw = (v.xy) * vec2(0.1, 0.2) + waveDir1 * time * 0.1;
 	view.w = bigWave.y;
 	refCoord.w = bigWave.x;
 	
diff --git a/indra/newview/app_settings/shaders/class1/interface/customalphaF.glsl b/indra/newview/app_settings/shaders/class1/interface/customalphaF.glsl
index a96d04cc39..f6b31a5956 100644
--- a/indra/newview/app_settings/shaders/class1/interface/customalphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/interface/customalphaF.glsl
@@ -38,7 +38,9 @@ VARYING vec2 vary_texcoord0;
 
 void main() 
 {
-	vec4 color = vertex_color*texture2D(diffuseMap, vary_texcoord0.xy);
-	color.a *= custom_alpha;
+	vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
+    color.rgb = pow(color.rgb, vec3(0.45));
+    color.rgb *= vertex_color.rgb;
+	color.a *= max(custom_alpha, vertex_color.a);
 	frag_color = color;
 }
diff --git a/indra/newview/app_settings/shaders/class1/interface/glowcombineF.glsl b/indra/newview/app_settings/shaders/class1/interface/glowcombineF.glsl
index 5c088b3a3c..b5bbbb5c73 100644
--- a/indra/newview/app_settings/shaders/class1/interface/glowcombineF.glsl
+++ b/indra/newview/app_settings/shaders/class1/interface/glowcombineF.glsl
@@ -25,14 +25,14 @@
 
 #extension GL_ARB_texture_rectangle : enable
 
+/*[EXTRA_CODE_HERE]*/
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
 #define frag_color gl_FragColor
 #endif
 
-/*[EXTRA_CODE_HERE]*/
-
 uniform sampler2D glowMap;
 uniform sampler2DRect screenMap;
 
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskF.glsl
index cad5b9ff04..f665394b46 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightAlphaMaskF.glsl
+ * @file class1\lighting\lightAlphaMaskF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskNonIndexedF.glsl
index 8918182853..b768d609f4 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightAlphaMaskNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightAlphaMaskNonIndexedF.glsl
+ * @file class1\lighting\lightAlphaMaskNonIndexedF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightF.glsl
index d6ebfcb825..9fd189358b 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightF.glsl
+ * @file class1\lighting\lightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightAlphaMaskF.glsl
index 5740987ab1..46390e4a0e 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightAlphaMaskF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightAlphaMaskF.glsl
+ * @file class1\lighting\lightFullbrightAlphaMaskF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightF.glsl
index c8771a3f1e..b967709c57 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightF.glsl
+ * @file class1\lighting\lightFullbrightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedAlphaMaskF.glsl
index f72f20b03d..e8e71beb44 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedAlphaMaskF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightNonIndexedAlphaMaskF.glsl
+ * @file class1\lighting\lightFullbrightNonIndexedAlphaMaskF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedF.glsl
index 2738ff8947..11a0919086 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightF.glsl
+ * @file class1\lighting\lightFullbrightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyF.glsl
index c8282e9a51..567811cd75 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightShinyF.glsl
+ * @file class1\lighting\lightFullbrightShinyF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -44,7 +44,7 @@ void fullbright_shiny_lighting()
 	color.rgb *= vertex_color.rgb;
 	
 	vec3 envColor = textureCube(environmentMap, vary_texcoord1.xyz).rgb;	
-	color.rgb = mix(color.rgb, envColor.rgb, vertex_color.a);
+	color.rgb = mix(color.rgb, envColor.rgb, vertex_color.a*0.75); // MAGIC NUMBER SL-12574; ALM: Off, Quality > Low
 
 	color.rgb = fullbrightShinyAtmosTransport(color.rgb);
 
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyNonIndexedF.glsl
index e7dbd4bbd2..3118453342 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightShinyF.glsl
+ * @file class1\lighting\lightFullbrightShinyF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterF.glsl
index 5886fc65be..f78e5e0e8a 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightShinyWaterF.glsl
+ * @file class1\lighting\lightFullbrightShinyWaterF.glsl
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2007, Linden Research, Inc.
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterNonIndexedF.glsl
index cddc7d8df8..90668bd2b6 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightShinyWaterNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightShinyWaterF.glsl
+ * @file class1\lighting\lightFullbrightShinyWaterF.glsl
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2007, Linden Research, Inc.
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl
index 6dd3bb937f..d04cd79f4b 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterAlphaMaskF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightWaterAlphaMaskF.glsl
+ * @file class1\lighting\lightFullbrightWaterAlphaMaskF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl
index d3dacf9bc4..27880b720c 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightWaterF.glsl
+ * @file class1\lighting\lightFullbrightWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedAlphaMaskF.glsl
index 63f92a8844..3b9c04b22b 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedAlphaMaskF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightWaterNonIndexedAlphaMaskF.glsl
+ * @file class1\lighting\lightFullbrightWaterNonIndexedAlphaMaskF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedF.glsl
index 0e68091e7c..e9fd8ac820 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFullbrightWaterNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFullbrightWaterF.glsl
+ * @file class1\lighting\lightFullbrightWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFuncSpecularV.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFuncSpecularV.glsl
index 85cddc647d..13a6dde4aa 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFuncSpecularV.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFuncSpecularV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFuncSpecularV.glsl
+ * @file class1/lighting\lightFuncSpecularV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -23,14 +23,6 @@
  * $/LicenseInfo$
  */
  
-
-
-float calcDirectionalLight(vec3 n, vec3 l)
-{
-	float a = max(dot(n,l),0.0);
-	return a;
-}
-
 float calcDirectionalSpecular(vec3 view, vec3 n, vec3 l)
 {
 	return pow(max(dot(reflect(view, n),l), 0.0),8.0);
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightFuncV.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightFuncV.glsl
index a9288b3df6..45701002b8 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightFuncV.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightFuncV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightFuncV.glsl
+ * @file class1\lighting\lightFuncV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -32,8 +32,7 @@ float calcDirectionalLight(vec3 n, vec3 l)
 	return a;
 }
 
-
-float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float is_pointlight)
+float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight)
 {
 	//get light vector
 	vec3 lv = lp.xyz-v;
@@ -54,6 +53,6 @@ float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, floa
 	//angular attenuation
 	da *= calcDirectionalLight(n, lv);
 
-	return da;	
+	return da;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightNonIndexedF.glsl
index 0aca768021..f9c7ad2ab3 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightF.glsl
+ * @file class1\lighting\lightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightShinyF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightShinyF.glsl
index 9208c148ef..f621a00785 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightShinyF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightShinyF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightShinyF.glsl
+ * @file class1\lighting\lightShinyF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -45,7 +45,7 @@ void shiny_lighting()
 	color.rgb *= vertex_color.rgb;
 	
 	vec3 envColor = textureCube(environmentMap, vary_texcoord1.xyz).rgb;	
-	color.rgb = mix(color.rgb, envColor.rgb, vertex_color.a);
+	color.rgb = mix(color.rgb, envColor.rgb, vertex_color.a*0.75); // MAGIC NUMBER SL-12574; ALM: Off, Quality > Low
 
 	color.rgb = atmosLighting(color.rgb);
 
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightShinyNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightShinyNonIndexedF.glsl
index 92628faa68..2b6f414005 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightShinyNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightShinyNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightShinyF.glsl
+ * @file class1\lighting\lightShinyF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterF.glsl
index 61841674e2..0f3371eba9 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightShinyWaterF.glsl
+ * @file class1\lighting\lightShinyWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterNonIndexedF.glsl
index 0b6e835fd0..c607fa64cb 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightShinyWaterNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightShinyWaterF.glsl
+ * @file class1\lighting\lightShinyWaterNonIndexedF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightSpecularV.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightSpecularV.glsl
index 24bf9b3cee..06aed40e26 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightSpecularV.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightSpecularV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightSpecularV.glsl
+ * @file class1\lighting\lightSpecularV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -27,10 +27,10 @@
 
 // All lights, no specular highlights
 
-vec4 sumLightsSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor, vec4 baseCol);
+vec4 sumLightsSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor);
 
-vec4 calcLightingSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor, vec4 baseCol)
+vec4 calcLightingSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor)
 {
-	return sumLightsSpecular(pos, norm, color, specularColor, baseCol);
+	return sumLightsSpecular(pos, norm, color, specularColor);
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightV.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightV.glsl
index 8045809b82..5e39d1629d 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightV.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightV.glsl
+ * @file class1\lighting\lightV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -26,11 +26,18 @@
 
 
 // All lights, no specular highlights
+vec3 atmosAmbient();
+vec4 sumLights(vec3 pos, vec3 norm, vec4 color);
+float getAmbientClamp();
 
-vec4 sumLights(vec3 pos, vec3 norm, vec4 color, vec4 baseLight);
-
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color)
 {
-	return sumLights(pos, norm, color, baseLight);
+	vec4 c = sumLights(pos, norm, color);
+
+#if !defined(AMBIENT_KILL)
+    c.rgb += atmosAmbient() * color.rgb * 0.5 * getAmbientClamp();
+#endif
+
+    return c;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskF.glsl
index 3426fea52f..0916797259 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightWaterAlphaMaskF.glsl
+ * @file class1\lighting\lightWaterAlphaMaskF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskNonIndexedF.glsl
index d9faa9b314..f2a84f1d42 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightWaterAlphaMaskNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightWaterAlphaMaskNonIndexedF.glsl
+ * @file class1\lighting\lightWaterAlphaMaskNonIndexedF.glsl
  *
  * $LicenseInfo:firstyear=2011&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightWaterF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightWaterF.glsl
index 00609e93cd..57ed993a66 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightWaterF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightWaterF.glsl
+ * @file class1\lighting\lightWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/lightWaterNonIndexedF.glsl b/indra/newview/app_settings/shaders/class1/lighting/lightWaterNonIndexedF.glsl
index 13ecb7a636..af5da1411b 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/lightWaterNonIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/lightWaterNonIndexedF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file lightWaterF.glsl
+ * @file class1\lighting\lightWaterNonIndexedF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/lighting/sumLightsSpecularV.glsl b/indra/newview/app_settings/shaders/class1/lighting/sumLightsSpecularV.glsl
index 7059ff31ae..7c3697c333 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/sumLightsSpecularV.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/sumLightsSpecularV.glsl
@@ -1,5 +1,5 @@
 /**
- * @file sumLightsSpecularV.glsl
+ * @file class1\lighting\sumLightsSpecularV.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -26,7 +26,7 @@
 
 
 float calcDirectionalLightSpecular(inout vec4 specular, vec3 view, vec3 n, vec3 l, vec3 lightCol, float da);
-vec3 atmosAmbient(vec3 light);
+vec3 atmosAmbient();
 vec3 atmosAffectDirectionalLight(float lightIntensity);
 vec3 atmosGetDiffuseSunlightColor();
 vec3 scaleDownLight(vec3 light);
@@ -34,7 +34,7 @@ vec3 scaleDownLight(vec3 light);
 uniform vec4 light_position[8];
 uniform vec3 light_diffuse[8];
 
-vec4 sumLightsSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor, vec4 baseCol)
+vec4 sumLightsSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor)
 {
 	vec4 col = vec4(0,0,0, color.a);
 		
@@ -45,8 +45,8 @@ vec4 sumLightsSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor
 
 	col.rgb += light_diffuse[1].rgb * calcDirectionalLightSpecular(specularColor, view, norm, light_position[1].xyz,light_diffuse[1].rgb, 1.0);
 	col.rgb = scaleDownLight(col.rgb);
-	col.rgb += atmosAmbient(baseCol.rgb);
-	col.rgb += atmosAffectDirectionalLight(calcDirectionalLightSpecular(specularSum, view, norm, light_position[0].xyz,atmosGetDiffuseSunlightColor()*baseCol.a, 1.0));
+	col.rgb += atmosAmbient();
+	col.rgb += atmosAffectDirectionalLight(calcDirectionalLightSpecular(specularSum, view, norm, light_position[0].xyz, atmosGetDiffuseSunlightColor(), 1.0));
 
 	col.rgb = min(col.rgb * color.rgb, 1.0);
 	specularColor.rgb = min(specularColor.rgb * specularSum.rgb, 1.0);
diff --git a/indra/newview/app_settings/shaders/class1/lighting/sumLightsV.glsl b/indra/newview/app_settings/shaders/class1/lighting/sumLightsV.glsl
index 41288c21c1..0c3ea4231e 100644
--- a/indra/newview/app_settings/shaders/class1/lighting/sumLightsV.glsl
+++ b/indra/newview/app_settings/shaders/class1/lighting/sumLightsV.glsl
@@ -1,5 +1,5 @@
 /**
- * @file sumLightsV.glsl
+ * @file class1\lighting\sumLightsV.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -28,22 +28,27 @@ uniform vec3 light_diffuse[8];
 
 float calcDirectionalLight(vec3 n, vec3 l);
 
-vec3 atmosAmbient(vec3 light);
+vec3 atmosAmbient();
 vec3 atmosAffectDirectionalLight(float lightIntensity);
 vec3 scaleDownLight(vec3 light);
 
-vec4 sumLights(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
+vec4 sumLights(vec3 pos, vec3 norm, vec4 color)
 {
-	vec4 col;
+	vec4 col = vec4(0);
 	col.a = color.a;
 	
 	col.rgb = light_diffuse[1].rgb * calcDirectionalLight(norm, light_position[1].xyz);
 	col.rgb = scaleDownLight(col.rgb);
-	col.rgb += atmosAmbient(baseLight.rgb);
+
+#if defined(LOCAL_LIGHT_KILL)
+    col.rgb = vec3(0);
+#endif
+
+#if !defined(SUNLIGHT_KILL)
 	col.rgb += atmosAffectDirectionalLight(calcDirectionalLight(norm, light_position[0].xyz));
-	
+#endif
+
 	col.rgb = min(col.rgb*color.rgb, 1.0);
-	
 	return col;	
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/objects/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/objects/fullbrightF.glsl
index a54c0caf81..31a262f1db 100644
--- a/indra/newview/app_settings/shaders/class1/objects/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/fullbrightF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file fullbrightF.glsl
+ * @file objects/fullbrightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/objects/fullbrightShinySkinnedV.glsl b/indra/newview/app_settings/shaders/class1/objects/fullbrightShinySkinnedV.glsl
index 79b552ee1a..1e244d9dfd 100644
--- a/indra/newview/app_settings/shaders/class1/objects/fullbrightShinySkinnedV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/fullbrightShinySkinnedV.glsl
@@ -35,6 +35,7 @@ ATTRIBUTE vec2 texcoord0;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 VARYING vec3 vary_texcoord1;
+VARYING vec4 vary_position;
 
 
 void calcAtmospherics(vec3 inPositionEye);
@@ -46,6 +47,9 @@ void main()
 	
 	mat = modelview_matrix * mat;
 	vec3 pos = (mat*vec4(position.xyz, 1.0)).xyz;
+
+    mat4 mvp = modelview_matrix * projection_matrix;
+    vary_position = mvp * vec4(position, 1.0);
 	
 	vec4 norm = vec4(position.xyz, 1.0);
 	norm.xyz += normal.xyz;
diff --git a/indra/newview/app_settings/shaders/class1/objects/previewV.glsl b/indra/newview/app_settings/shaders/class1/objects/previewV.glsl
index 7f3f84398b..88959266c8 100644
--- a/indra/newview/app_settings/shaders/class1/objects/previewV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/previewV.glsl
@@ -52,7 +52,7 @@ float calcDirectionalLight(vec3 n, vec3 l)
 }
 
 
-float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float is_pointlight)
+float calcLocalLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float is_pointlight)
 {
 	//get light vector
 	vec3 lv = lp.xyz-v;
@@ -91,8 +91,8 @@ void main()
 
 	// Collect normal lights (need to be divided by two, as we later multiply by 2)
 	col.rgb += light_diffuse[1].rgb * calcDirectionalLight(norm, light_position[1].xyz);
-	col.rgb += light_diffuse[2].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[2], light_direction[2], light_attenuation[2].x, light_attenuation[2].z);
-	col.rgb += light_diffuse[3].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[3], light_direction[3], light_attenuation[3].x, light_attenuation[3].z);
+	col.rgb += light_diffuse[2].rgb*calcLocalLight(pos.xyz, norm, light_position[2], light_direction[2], light_attenuation[2].x, light_attenuation[2].z);
+	col.rgb += light_diffuse[3].rgb*calcLocalLight(pos.xyz, norm, light_position[3], light_direction[3], light_attenuation[3].x, light_attenuation[3].z);
 		
 	vertex_color = col*color;
 }
diff --git a/indra/newview/app_settings/shaders/class1/objects/shinySimpleSkinnedV.glsl b/indra/newview/app_settings/shaders/class1/objects/shinySimpleSkinnedV.glsl
index 591d6fc5c9..727bae19c0 100644
--- a/indra/newview/app_settings/shaders/class1/objects/shinySimpleSkinnedV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/shinySimpleSkinnedV.glsl
@@ -36,7 +36,7 @@ VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 VARYING vec3 vary_texcoord1;
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 void calcAtmospherics(vec3 inPositionEye);
 mat4 getObjectSkinnedTransform();
 
@@ -59,7 +59,7 @@ void main()
 
 	calcAtmospherics(pos.xyz);
 
-	vec4 color = calcLighting(pos.xyz, norm.xyz, diffuse_color, vec4(0.));
+	vec4 color = calcLighting(pos.xyz, norm.xyz, diffuse_color);
 	vertex_color = color;
 	
 	gl_Position = projection_matrix*vec4(pos, 1.0);
diff --git a/indra/newview/app_settings/shaders/class1/objects/shinyV.glsl b/indra/newview/app_settings/shaders/class1/objects/shinyV.glsl
index fdb3453cc5..4ba8194d03 100644
--- a/indra/newview/app_settings/shaders/class1/objects/shinyV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/shinyV.glsl
@@ -39,7 +39,7 @@ VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 VARYING vec3 vary_texcoord1;
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 
 void calcAtmospherics(vec3 inPositionEye);
 
@@ -61,5 +61,5 @@ void main()
 
 	calcAtmospherics(pos.xyz);
 
-	vertex_color = calcLighting(pos.xyz, norm, diffuse_color, vec4(0.0));	
+	vertex_color = calcLighting(pos.xyz, norm, diffuse_color);	
 }
diff --git a/indra/newview/app_settings/shaders/class1/objects/simpleNoColorV.glsl b/indra/newview/app_settings/shaders/class1/objects/simpleNoColorV.glsl
index 0be52a52af..22821a2f76 100644
--- a/indra/newview/app_settings/shaders/class1/objects/simpleNoColorV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/simpleNoColorV.glsl
@@ -38,7 +38,7 @@ VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 void calcAtmospherics(vec3 inPositionEye);
 
 void main()
@@ -52,7 +52,7 @@ void main()
 
 	calcAtmospherics(pos.xyz);
 
-	vec4 col = calcLighting(pos.xyz, norm, color, vec4(0.));
+	vec4 col = calcLighting(pos.xyz, norm, color);
 	vertex_color = col;
 
 	
diff --git a/indra/newview/app_settings/shaders/class1/objects/simpleNonIndexedV.glsl b/indra/newview/app_settings/shaders/class1/objects/simpleNonIndexedV.glsl
index cb80697d15..e605676819 100644
--- a/indra/newview/app_settings/shaders/class1/objects/simpleNonIndexedV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/simpleNonIndexedV.glsl
@@ -37,7 +37,7 @@ VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 void calcAtmospherics(vec3 inPositionEye);
 
 void main()
@@ -54,7 +54,7 @@ void main()
 
 	calcAtmospherics(pos.xyz);
 
-	vec4 color = calcLighting(pos.xyz, norm, diffuse_color, vec4(0.));
+	vec4 color = calcLighting(pos.xyz, norm, diffuse_color);
 	vertex_color = color;
 
 	
diff --git a/indra/newview/app_settings/shaders/class1/objects/simpleSkinnedV.glsl b/indra/newview/app_settings/shaders/class1/objects/simpleSkinnedV.glsl
index 1c6e53b187..df31b5a79f 100644
--- a/indra/newview/app_settings/shaders/class1/objects/simpleSkinnedV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/simpleSkinnedV.glsl
@@ -35,7 +35,7 @@ VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 void calcAtmospherics(vec3 inPositionEye);
 mat4 getObjectSkinnedTransform();
 
@@ -56,7 +56,7 @@ void main()
 		
 	calcAtmospherics(pos.xyz);
 
-	vec4 color = calcLighting(pos.xyz, norm.xyz, diffuse_color, vec4(0.));
+	vec4 color = calcLighting(pos.xyz, norm.xyz, diffuse_color);
 	vertex_color = color;
 	
 	gl_Position = projection_matrix*vec4(pos, 1.0);
diff --git a/indra/newview/app_settings/shaders/class1/objects/simpleTexGenV.glsl b/indra/newview/app_settings/shaders/class1/objects/simpleTexGenV.glsl
index d4dee78793..945f80f31e 100644
--- a/indra/newview/app_settings/shaders/class1/objects/simpleTexGenV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/simpleTexGenV.glsl
@@ -37,7 +37,7 @@ uniform vec4 color;
 uniform vec4 object_plane_t;
 uniform vec4 object_plane_s;
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 void calcAtmospherics(vec3 inPositionEye);
 
 VARYING vec4 vertex_color;
@@ -70,7 +70,7 @@ void main()
 
 	calcAtmospherics(pos.xyz);
 
-	vec4 color = calcLighting(pos.xyz, norm, color, vec4(0.));
+	vec4 color = calcLighting(pos.xyz, norm, color);
 	vertex_color = color;
 
 	
diff --git a/indra/newview/app_settings/shaders/class1/objects/simpleV.glsl b/indra/newview/app_settings/shaders/class1/objects/simpleV.glsl
index 37a20383e2..a59bd9c0a6 100644
--- a/indra/newview/app_settings/shaders/class1/objects/simpleV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/simpleV.glsl
@@ -34,7 +34,7 @@ ATTRIBUTE vec2 texcoord0;
 ATTRIBUTE vec3 normal;
 ATTRIBUTE vec4 diffuse_color;
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 void calcAtmospherics(vec3 inPositionEye);
 
 
@@ -57,7 +57,7 @@ void main()
 
 	calcAtmospherics(pos.xyz);
 
-	vec4 color = calcLighting(pos.xyz, norm, diffuse_color, vec4(0.));
+	vec4 color = calcLighting(pos.xyz, norm, diffuse_color);
 	vertex_color = color;
 
 	
diff --git a/indra/newview/app_settings/shaders/class1/objects/treeV.glsl b/indra/newview/app_settings/shaders/class1/objects/treeV.glsl
index fa01a27ec0..0227e6e3b8 100644
--- a/indra/newview/app_settings/shaders/class1/objects/treeV.glsl
+++ b/indra/newview/app_settings/shaders/class1/objects/treeV.glsl
@@ -31,8 +31,9 @@ uniform mat4 modelview_projection_matrix;
 ATTRIBUTE vec3 position;
 ATTRIBUTE vec2 texcoord0;
 ATTRIBUTE vec3 normal;
+ATTRIBUTE vec4 diffuse_color;
 
-vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
+vec4 calcLighting(vec3 pos, vec3 norm, vec4 color);
 void calcAtmospherics(vec3 inPositionEye);
 
 VARYING vec4 vertex_color;
@@ -53,8 +54,6 @@ void main()
 
 	calcAtmospherics(pos.xyz);
 
-	vec4 color = calcLighting(pos.xyz, norm, vec4(1,1,1,1), vec4(0.));
+	vec4 color = calcLighting(pos.xyz, norm, diffuse_color);
 	vertex_color = color;
-
-	
 }
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl
index aacc503e13..4e0618e276 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file atmosphericsF.glsl
+ * @file class1\windlight\atmosphericsF.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -23,11 +23,26 @@
  * $/LicenseInfo$
  */
  
+vec3 atmosFragAmbient(vec3 light, vec3 sunlit)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
+}
 
+vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
+}
+
+vec3 atmosFragAffectDirectionalLight(float light, vec3 sunlit)
+{
+   return light * sunlit;
+}
 
 vec3 atmosLighting(vec3 light)
 {
-	/* stub function for fallback compatibility on class1 hardware */
-	return light;
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsFuncs.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsFuncs.glsl
new file mode 100644
index 0000000000..dcb02bd1c1
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsFuncs.glsl
@@ -0,0 +1,154 @@
+/** 
+ * @file class1\windlight\atmosphericsFuncs.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2019, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+uniform vec4 lightnorm;
+uniform vec4 sunlight_color;
+uniform vec4 moonlight_color;
+uniform int sun_up_factor;
+uniform vec4 ambient_color;
+uniform vec4 blue_horizon;
+uniform vec4 blue_density;
+uniform float haze_horizon;
+uniform float haze_density;
+uniform float cloud_shadow;
+uniform float density_multiplier;
+uniform float distance_multiplier;
+uniform float max_y;
+uniform vec4 glow;
+uniform float scene_light_strength;
+uniform mat3 ssao_effect_mat;
+uniform int no_atmo;
+uniform float sun_moon_glow_factor;
+
+float getAmbientClamp()
+{
+    return 1.0f;
+}
+
+
+void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao) {
+
+    vec3 P = inPositionEye;
+   
+    //(TERRAIN) limit altitude
+    if (P.y > max_y) P *= (max_y / P.y);
+    if (P.y < -max_y) P *= (-max_y / P.y); 
+
+    vec3 tmpLightnorm = lightnorm.xyz;
+
+    vec3 Pn = normalize(P);
+    float Plen = length(P);
+
+    vec4 temp1 = vec4(0);
+    vec3 temp2 = vec3(0);
+    vec4 blue_weight;
+    vec4 haze_weight;
+    vec4 sunlight = (sun_up_factor == 1) ? sunlight_color : moonlight_color;
+    vec4 light_atten;
+
+    float dens_mul = density_multiplier;
+    float dist_mul = distance_multiplier;
+
+    //sunlight attenuation effect (hue and brightness) due to atmosphere
+    //this is used later for sunlight modulation at various altitudes
+    light_atten = (blue_density + vec4(haze_density * 0.25)) * (dens_mul * max_y);
+        //I had thought blue_density and haze_density should have equal weighting,
+        //but attenuation due to haze_density tends to seem too strong
+
+    temp1 = blue_density + vec4(haze_density);
+    blue_weight = blue_density / temp1;
+    haze_weight = vec4(haze_density) / temp1;
+
+    //(TERRAIN) compute sunlight from lightnorm only (for short rays like terrain)
+    temp2.y = max(0.0, tmpLightnorm.y);
+    if (abs(temp2.y) > 0.000001f)
+    {
+        temp2.y = 1. / abs(temp2.y);
+    }
+    temp2.y = max(0.0000001f, temp2.y);
+    sunlight *= exp(-light_atten * temp2.y);
+
+    // main atmospheric scattering line integral
+    temp2.z = Plen * dens_mul;
+
+    // Transparency (-> temp1)
+    // ATI Bugfix -- can't store temp1*temp2.z*dist_mul in a variable because the ati
+    // compiler gets confused.
+    temp1 = exp(-temp1 * temp2.z * dist_mul);
+
+    //final atmosphere attenuation factor
+    atten = temp1.rgb;
+    
+    //compute haze glow
+    //(can use temp2.x as temp because we haven't used it yet)
+    temp2.x = dot(Pn, tmpLightnorm.xyz);
+
+    // dampen sun additive contrib when not facing it...
+    if (length(light_dir) > 0.01)
+    {
+        temp2.x *= max(0.0f, dot(light_dir, Pn));
+    }
+    temp2.x = 1. - temp2.x;
+        //temp2.x is 0 at the sun and increases away from sun
+    temp2.x = max(temp2.x, .001);    //was glow.y
+        //set a minimum "angle" (smaller glow.y allows tighter, brighter hotspot)
+    temp2.x *= glow.x;
+        //higher glow.x gives dimmer glow (because next step is 1 / "angle")
+    temp2.x = pow(temp2.x, glow.z);
+        //glow.z should be negative, so we're doing a sort of (1 / "angle") function
+
+    //add "minimum anti-solar illumination"
+    temp2.x += .25;
+
+    temp2.x *= sun_moon_glow_factor;
+ 
+    vec4 amb_color = ambient_color; 
+    
+    //increase ambient when there are more clouds
+    vec4 tmpAmbient = amb_color + (vec4(1.) - amb_color) * cloud_shadow * 0.5;
+    
+    /*  decrease value and saturation (that in HSV, not HSL) for occluded areas
+     * // for HSV color/geometry used here, see http://gimp-savvy.com/BOOK/index.html?node52.html
+     * // The following line of code performs the equivalent of:
+     * float ambAlpha = tmpAmbient.a;
+     * float ambValue = dot(vec3(tmpAmbient), vec3(0.577)); // projection onto <1/rt(3), 1/rt(3), 1/rt(3)>, the neutral white-black axis
+     * vec3 ambHueSat = vec3(tmpAmbient) - vec3(ambValue);
+     * tmpAmbient = vec4(RenderSSAOEffect.valueFactor * vec3(ambValue) + RenderSSAOEffect.saturationFactor *(1.0 - ambFactor) * ambHueSat, ambAlpha);
+     */
+    if (use_ao)
+    {
+        tmpAmbient = vec4(mix(ssao_effect_mat * tmpAmbient.rgb, tmpAmbient.rgb, ambFactor), tmpAmbient.a);
+    }
+
+    //haze color
+        additive =
+        vec3(blue_horizon * blue_weight * (sunlight*(1.-cloud_shadow) + tmpAmbient)
+      + (haze_horizon * haze_weight) * (sunlight*(1.-cloud_shadow) * temp2.x
+          + tmpAmbient));
+
+    //brightness of surface both sunlight and ambient
+    sunlit = sunlight.rgb * 0.5;
+    amblit = tmpAmbient.rgb * .25;
+    additive *= vec3(1.0 - temp1);
+}
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersF.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersF.glsl
new file mode 100644
index 0000000000..206a51db27
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersF.glsl
@@ -0,0 +1,51 @@
+/** 
+ * @file class1\windlight\atmosphericsHelpersF.glsl 
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+uniform vec4 sunlight_color;
+uniform vec4 light_ambient;
+uniform int no_atmo;
+
+vec3 atmosAmbient()
+{
+    if (no_atmo == 1) return vec3(0.16);
+    return light_ambient.rgb;
+}
+
+vec3 atmosAffectDirectionalLight(float lightIntensity)
+{
+    return sunlight_color.rgb * lightIntensity;
+}
+
+vec3 atmosGetDiffuseSunlightColor()
+{
+    return sunlight_color.rgb;
+}
+
+vec3 scaleDownLight(vec3 light)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersV.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersV.glsl
index 6ff860362c..c266f9732f 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersV.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file atmosphericsHelpersV.glsl 
+ * @file class1\windlight\atmosphericsHelpersV.glsl 
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -23,33 +23,35 @@
  * $/LicenseInfo$
  */
  
-uniform vec4 sunlight_color_copy;
+uniform vec4 sunlight_color;
 uniform vec4 light_ambient;
+uniform int no_atmo;
 
-vec3 atmosAmbient(vec3 light)
+vec3 atmosAmbient()
 {
-	return light + light_ambient.rgb;
+    if (no_atmo == 1) return vec3(0.66);
+    return light_ambient.rgb;
 }
 
 vec3 atmosAffectDirectionalLight(float lightIntensity)
 {
-	return sunlight_color_copy.rgb * lightIntensity;
+    return sunlight_color.rgb * lightIntensity;
 }
 
 vec3 atmosGetDiffuseSunlightColor()
 {
-	return sunlight_color_copy.rgb;
+    return sunlight_color.rgb;
 }
 
 vec3 scaleDownLight(vec3 light)
 {
-	/* stub function for fallback compatibility on class1 hardware */
-	return light;
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
 }
 
 vec3 scaleUpLight(vec3 light)
 {
-	/* stub function for fallback compatibility on class1 hardware */
-	return light;
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsV.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsV.glsl
index 76d7d5059d..20457ad125 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsV.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file atmosphericsV.glsl 
+ * @file class1\windlight\atmosphericsV.glsl 
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -29,7 +29,7 @@ void setPositionEye(vec3 v);
 
 void calcAtmospherics(vec3 inPositionEye)
 {
-	/* stub function for fallback compatibility on class1 hardware */
-	setPositionEye(inPositionEye);
+    /* stub function for fallback compatibility on class1 hardware */
+    setPositionEye(inPositionEye);
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsF.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsF.glsl
index 8bdae328bd..a0699affbf 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file atmosphericVarsF.glsl
+ * @file class1\windlight\atmosphericVarsF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsV.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsV.glsl
index 8ec9ae617c..bd1d150fc8 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsV.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file atmosphericVarsV.glsl
+ * @file class1\windlight\atmosphericVarsV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterF.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterF.glsl
index 636d4af006..5dc086ab1e 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file atmosphericVarsWaterF.glsl
+ * @file class1\windlight\atmosphericVarsWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterV.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterV.glsl
index 8afcc20f6d..e59eca265a 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterV.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsVarsWaterV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file atmosphericVarsWaterV.glsl
+ * @file class1\windlight\atmosphericVarsWaterV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/windlight/cloudShadowF.glsl b/indra/newview/app_settings/shaders/class1/windlight/cloudShadowF.glsl
new file mode 100644
index 0000000000..82fad4db5a
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/cloudShadowF.glsl
@@ -0,0 +1,127 @@
+/** 
+ * @file class1/windlight/cloudShadowF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform sampler2D diffuseMap;
+
+VARYING vec4 pos;
+VARYING float target_pos_x;
+VARYING float vary_CloudDensity;
+VARYING vec2 vary_texcoord0;
+VARYING vec2 vary_texcoord1;
+VARYING vec2 vary_texcoord2;
+VARYING vec2 vary_texcoord3;
+
+uniform sampler2D cloud_noise_texture;
+uniform sampler2D cloud_noise_texture_next;
+uniform float blend_factor;
+uniform vec4 cloud_pos_density1;
+uniform vec4 cloud_pos_density2;
+uniform vec4 sunlight_color;
+uniform vec4 cloud_color;
+uniform float cloud_shadow;
+uniform float cloud_scale;
+uniform float cloud_variance;
+uniform vec3 camPosLocal;
+uniform vec3 sun_dir;
+uniform float sun_size;
+uniform float far_z;
+
+#if !defined(DEPTH_CLAMP)
+VARYING vec4 post_pos;
+#endif
+
+vec4 cloudNoise(vec2 uv)
+{
+   vec4 a = texture2D(cloud_noise_texture, uv);
+   vec4 b = texture2D(cloud_noise_texture_next, uv);
+   vec4 cloud_noise_sample = mix(a, b, blend_factor);
+   return normalize(cloud_noise_sample);
+}
+
+void main()
+{
+    if (cloud_scale >= 0.0001)
+    {
+        // Set variables
+        vec2 uv1 = vary_texcoord0.xy;
+        vec2 uv2 = vary_texcoord1.xy;
+        vec2 uv3 = vary_texcoord2.xy;
+        float cloudDensity = 2.0 * (cloud_shadow - 0.25);
+    
+        vec2 uv4 = vary_texcoord3.xy;
+    
+        vec2 disturbance  = vec2(cloudNoise(uv1 / 8.0f).x, cloudNoise((uv3 + uv1) / 16.0f).x) * cloud_variance * (1.0f - cloud_scale * 0.25f);
+        vec2 disturbance2 = vec2(cloudNoise((uv1 + uv3) / 4.0f).x, cloudNoise((uv4 + uv2) / 8.0f).x) * cloud_variance * (1.0f - cloud_scale * 0.25f);
+    
+        // Offset texture coords
+        uv1 += cloud_pos_density1.xy + (disturbance * 0.2);    //large texture, visible density
+        uv2 += cloud_pos_density1.xy;   //large texture, self shadow
+        uv3 += cloud_pos_density2.xy;   //small texture, visible density
+        uv4 += cloud_pos_density2.xy;   //small texture, self shadow
+    
+        float density_variance = min(1.0, (disturbance.x* 2.0 + disturbance.y* 2.0 + disturbance2.x + disturbance2.y) * 4.0);
+    
+        cloudDensity *= 1.0 - (density_variance * density_variance);
+    
+        // Compute alpha1, the main cloud opacity
+        float alpha1 = (cloudNoise(uv1).x - 0.5) + (cloudNoise(uv3).x - 0.5) * cloud_pos_density2.z;
+        alpha1 = min(max(alpha1 + cloudDensity, 0.) * 10 * cloud_pos_density1.z, 1.);
+    
+        // And smooth
+        alpha1 = 1. - alpha1 * alpha1;
+        alpha1 = 1. - alpha1 * alpha1;  
+    
+        if (alpha1 < 0.001f)
+        {
+            discard;
+        }
+    
+        // Compute alpha2, for self shadowing effect
+        // (1 - alpha2) will later be used as percentage of incoming sunlight
+        float alpha2 = (cloudNoise(uv2).x - 0.5);
+        alpha2 = min(max(alpha2 + cloudDensity, 0.) * 2.5 * cloud_pos_density1.z, 1.);
+    
+        // And smooth
+        alpha2 = 1. - alpha2;
+        alpha2 = 1. - alpha2 * alpha2;  
+    
+        frag_color = vec4(alpha1, alpha1, alpha1, 1);
+    }
+    else
+    {
+        frag_color = vec4(1);
+    }
+
+#if !defined(DEPTH_CLAMP)
+    gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
+#endif
+
+}
diff --git a/indra/newview/app_settings/shaders/class1/windlight/cloudShadowV.glsl b/indra/newview/app_settings/shaders/class1/windlight/cloudShadowV.glsl
new file mode 100644
index 0000000000..09b6004481
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/cloudShadowV.glsl
@@ -0,0 +1,61 @@
+/** 
+ * @file class1\windlight\cloudShadowV.glsl
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_projection_matrix;
+uniform float shadow_target_width;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec4 diffuse_color;
+ATTRIBUTE vec2 texcoord0;
+
+#if !defined(DEPTH_CLAMP)
+VARYING float pos_zd2;
+#endif
+
+VARYING vec4 pos;
+VARYING float target_pos_x;
+VARYING vec2 vary_texcoord0;
+
+void passTextureIndex();
+
+void main()
+{
+	//transform vertex
+	vec4 pre_pos = vec4(position.xyz, 1.0);
+	pos = modelview_projection_matrix * pre_pos;
+	target_pos_x = 0.5 * (shadow_target_width - 1.0) * pos.x;
+
+#if !defined(DEPTH_CLAMP)
+	pos_zd2 = pos.z * 0.5;
+	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
+#else
+	gl_Position = pos;
+#endif
+	
+	passTextureIndex();
+
+	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+}
diff --git a/indra/newview/app_settings/shaders/class1/windlight/gammaF.glsl b/indra/newview/app_settings/shaders/class1/windlight/gammaF.glsl
index 62f4e51449..fc51e81177 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/gammaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/gammaF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file gammaF.glsl
+ * @file class1\windlight\gammaF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -23,17 +23,30 @@
  * $/LicenseInfo$
  */
  
+uniform int no_atmo;
 
-
-uniform vec4 gamma;
+vec3 scaleSoftClipFrag(vec3 light)
+{
+	// For compatibility with lower cards. Do nothing.
+	return light;
+}
 
 /// Soft clips the light with a gamma correction
-vec3 scaleSoftClip(vec3 light) {
-	// For compatibility with lower cards. Do nothing.
+vec3 scaleSoftClip(vec3 light)
+{
+	// For compatibility with lower cards. Do nothing
+	return light;
+}
+
+vec3 fullbrightScaleSoftClipFrag(vec3 light, vec3 additive, vec3 atten)
+{
+	// For compatibility with lower cards. Do nothing
 	return light;
 }
 
-vec3 fullbrightScaleSoftClip(vec3 light) {
-	return scaleSoftClip(light);
+vec3 fullbrightScaleSoftClip(vec3 light)
+{
+	// For compatibility with lower cards. Do nothing
+    return light;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl b/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl
new file mode 100644
index 0000000000..24f3992e32
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl
@@ -0,0 +1,64 @@
+/** 
+ * @file class1\wl\moonF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform vec4 color;
+uniform vec4 sunlight_color;
+uniform vec4 moonlight_color;
+uniform vec3 lumWeights;
+uniform float moon_brightness;
+uniform float minLuminance;
+uniform sampler2D diffuseMap;
+uniform sampler2D altDiffuseMap;
+uniform float blend_factor; // interp factor between moon A/B
+VARYING vec2 vary_texcoord0;
+
+void main() 
+{
+    vec4 moonA = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 moonB = texture2D(altDiffuseMap, vary_texcoord0.xy);
+    vec4 c     = mix(moonA, moonB, blend_factor);
+
+    // mix factor which blends when sunlight is brighter
+    // and shows true moon color at night
+    vec3 luma_weights = vec3(0.3, 0.5, 0.3);
+    float mix = 1.0f - dot(normalize(sunlight_color.rgb), luma_weights);
+
+    vec3 exp = vec3(1.0 - mix * moon_brightness) * 2.0 - 1.0;
+    c.rgb = pow(c.rgb, exp);
+    //c.rgb *= moonlight_color.rgb;
+
+    frag_color = vec4(c.rgb, c.a);
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/windlight/moonV.glsl b/indra/newview/app_settings/shaders/class1/windlight/moonV.glsl
new file mode 100644
index 0000000000..8cd4b2ef47
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/moonV.glsl
@@ -0,0 +1,49 @@
+/** 
+ * @file class1\wl\moonV.glsl
+ *
+  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_matrix;
+uniform mat4 modelview_projection_matrix;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec2 texcoord0;
+
+void calcAtmospherics(vec3 inPositionEye);
+
+VARYING vec2 vary_texcoord0;
+
+void main()
+{
+    //transform vertex
+    vec3 offset = vec3(0, 0, 50);
+    vec4 vert = vec4(position.xyz - offset, 1.0);
+    vec4 pos = (modelview_matrix * vert);
+
+    gl_Position = modelview_projection_matrix*vert;
+    
+    vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+    
+    calcAtmospherics(pos.xyz);
+}
diff --git a/indra/newview/app_settings/shaders/class1/windlight/sunDiscF.glsl b/indra/newview/app_settings/shaders/class1/windlight/sunDiscF.glsl
new file mode 100644
index 0000000000..b9ae7a0226
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/sunDiscF.glsl
@@ -0,0 +1,59 @@
+/** 
+ * @file class1\wl\sunDiscF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+vec3 fullbrightAtmosTransport(vec3 light);
+vec3 fullbrightScaleSoftClip(vec3 light);
+
+uniform sampler2D diffuseMap;
+uniform sampler2D altDiffuseMap;
+uniform float blend_factor; // interp factor between sun A/B
+VARYING vec2 vary_texcoord0;
+VARYING float sun_fade;
+
+void main() 
+{
+    vec4 sunA = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 sunB = texture2D(altDiffuseMap, vary_texcoord0.xy);
+    vec4 c     = mix(sunA, sunB, blend_factor);
+
+// SL-9806 stars poke through
+//    c.a *= sun_fade;
+
+    c.rgb = pow(c.rgb, vec3(0.7f));
+    c.rgb = fullbrightAtmosTransport(c.rgb);
+    c.rgb = fullbrightScaleSoftClip(c.rgb);
+    frag_color = c;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/windlight/sunDiscV.glsl b/indra/newview/app_settings/shaders/class1/windlight/sunDiscV.glsl
new file mode 100644
index 0000000000..6c0e795f6b
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/sunDiscV.glsl
@@ -0,0 +1,51 @@
+/** 
+ * @file class1\wl\sunDiscV.glsl
+ *
+  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_matrix;
+uniform mat4 modelview_projection_matrix;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec2 texcoord0;
+
+VARYING vec2 vary_texcoord0;
+VARYING float sun_fade;
+
+void calcAtmospherics(vec3 eye_pos);
+
+void main()
+{
+    //transform vertex
+    vec3 offset = vec3(0, 0, 50);
+    vec4 vert = vec4(position.xyz - offset, 1.0);
+    vec4 pos = modelview_projection_matrix*vert;
+
+    sun_fade = smoothstep(0.3, 1.0, (position.z + 50) / 512.0f);
+    gl_Position = pos;
+    
+    calcAtmospherics(pos.xyz);
+
+    vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+}
diff --git a/indra/newview/app_settings/shaders/class1/windlight/transportF.glsl b/indra/newview/app_settings/shaders/class1/windlight/transportF.glsl
index 7c95ecdb14..a937d9fa99 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/transportF.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/transportF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file transportF.glsl
+ * @file class1/windlight/transportF.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -22,25 +22,35 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
 
+uniform int no_atmo;
 
-vec3 atmosTransport(vec3 light)
+vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
 {
-	/* stub function for fallback compatibility on class1 hardware */
+    /* stub function for fallback compatibility on class1 hardware */
 	return light;
 }
 
-vec3 fullbrightAtmosTransport(vec3 light)
+vec3 atmosTransport(vec3 light)
 {
 	/* stub function for fallback compatibility on class1 hardware */
-	return light;
+    return light;
+}
+
+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
 }
 
+vec3 fullbrightAtmosTransport(vec3 light)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
+}
 
 vec3 fullbrightShinyAtmosTransport(vec3 light)
 {
-	/* stub function for fallback compatibility on class1 hardware */
-	return light;
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
 }
-