Merge

20 files changed, 789 insertions, 967 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index 07b0f2a98a..33e61f2062 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -84,11 +84,8 @@ uniform vec3 light_diffuse[8];
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
 vec2 encode_normal (vec3 n);
 vec3 decode_normal (vec2 enc);
-
 vec3 scaleSoftClip(vec3 l);
 vec3 atmosFragAmbient(vec3 light, vec3 sunlit);
 vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten);
@@ -97,46 +94,46 @@ void calcFragAtmospherics(vec3 inPositionEye, float ambFactor, out vec3 sunlit,
 
 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 da = 1.0;
-
-	vec3 col = vec3(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;
-
-		// no spec for alpha shader...
-	}
-
-	return max(col, vec3(0.0,0.0,0.0));
+    //get light vector
+    vec3 lv = lp.xyz-v;
+    
+    //get distance
+    float d = length(lv);
+    
+    float da = 1.0;
+
+    vec3 col = vec3(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;
+
+        // no spec for alpha shader...
+    }
+
+    return max(col, vec3(0.0,0.0,0.0));
 }
 
 #if HAS_SHADOW
-float pcfShadow(sampler2DShadow shadowMap, vec4 stc)
+float pcfShadowLegacy(sampler2DShadow shadowMap, vec4 stc)
 {
 	stc.xyz /= stc.w;
 	stc.z += shadow_bias;
@@ -155,186 +152,175 @@ float pcfShadow(sampler2DShadow shadowMap, vec4 stc)
 }
 #endif
 
+float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float bias_scale, vec2 pos_screen);
 
 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;
+    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;
 
-#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;
-		}
-		
+    float shadow = 1.0;
 
-		shadow /= weight;
-	}
-	else
-	{
-		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 += pcfShadowLegacy(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 += pcfShadowLegacy(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 += pcfShadowLegacy(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 += pcfShadowLegacy(shadowMap0, lpos)*w;
+            weight += w;
+        }
+        
+
+        shadow /= weight;
+    }
+    else
+    {
+        shadow = 1.0;
+    }
 #endif
 
 #ifdef USE_INDEXED_TEX
-	vec4 diff = diffuseLookup(vary_texcoord0.xy);
+    vec4 diff = diffuseLookup(vary_texcoord0.xy);
 #else
-	vec4 diff = texture2D(diffuseMap,vary_texcoord0.xy);
+    vec4 diff = texture2D(diffuseMap,vary_texcoord0.xy);
 #endif
 
 #ifdef FOR_IMPOSTOR
-	vec4 color;
-	color.rgb = diff.rgb;
-	color.a = 1.0;
+    vec4 color;
+    color.rgb = diff.rgb;
+    color.a = 1.0;
 
 #ifdef USE_VERTEX_COLOR
-	float final_alpha = diff.a * vertex_color.a;
-	diff.rgb *= vertex_color.rgb;
+    float final_alpha = diff.a * vertex_color.a;
+    diff.rgb *= vertex_color.rgb;
 #else
-	float final_alpha = diff.a;
+    float final_alpha = diff.a;
 #endif
-	
-	// Insure we don't pollute depth with invis pixels in impostor rendering
-	//
-	if (final_alpha < 0.01)
-	{
-		discard;
-	}
+    
+    // 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;
+    float final_alpha = diff.a * vertex_color.a;
+    diff.rgb *= vertex_color.rgb;
 #else
-	float final_alpha = diff.a;
+    float final_alpha = diff.a;
 #endif
 
+    vec3 sunlit;
+    vec3 amblit;
+    vec3 additive;
+    vec3 atten;
+    calcFragAtmospherics(pos.xyz, 1.0, sunlit, amblit, additive, atten);
 
-	vec4 gamma_diff = diff;	
-	diff.rgb = srgb_to_linear(diff.rgb);
+    vec2 abnormal   = encode_normal(norm.xyz);
+         norm.xyz   = decode_normal(abnormal.xy);
 
-	vec3 norm = vary_norm; 
-
-        vec3 sunlit;
-        vec3 amblit;
-        vec3 additive;
-        vec3 atten;
-
-	calcFragAtmospherics(pos.xyz, 1.0, sunlit, amblit, additive, atten);
-
-	vec2 abnormal	= encode_normal(norm.xyz);
-		 norm.xyz   = decode_normal(abnormal.xy);
-
-	float sun_da  = dot(norm.xyz, sun_dir.xyz);
-	float moon_da = dot(norm.xyz, moon_dir.xyz);
+    float sun_da  = dot(norm.xyz, sun_dir.xyz);
+    float moon_da = dot(norm.xyz, moon_dir.xyz);
 
     float final_da = max(sun_da, moon_da);
           final_da = min(final_da, shadow);
           final_da = clamp(final_da, 0.0f, 1.0f);
-	  final_da = pow(final_da, 1.0/1.3);
+      final_da = pow(final_da, display_gamma);
 
-	vec4 color = vec4(0,0,0,0);
+    vec4 color = vec4(0,0,0,0);
 
-	color.rgb = atmosFragAmbient(color.rgb, amblit);
-	color.a   = final_alpha;
+    color.rgb = atmosFragAmbient(color.rgb, amblit);
+    color.a   = final_alpha;
 
-	float ambient = abs(final_da);
-	ambient *= 0.5;
-	ambient *= ambient;
-	ambient = (1.0-ambient);
+    float ambient = abs(final_da);
+    ambient *= 0.5;
+    ambient *= ambient;
+    ambient = (1.0-ambient);
 
-	color.rgb *= ambient;
-	color.rgb += atmosFragAffectDirectionalLight(final_da, sunlit);
-	color.rgb *= gamma_diff.rgb;
+    color.rgb *= ambient;
+    color.rgb += (final_da * sunlit);
+    color.rgb *= diff.rgb;
 
-	//color.rgb = mix(diff.rgb, color.rgb, final_alpha);
-	
-	color.rgb = atmosFragLighting(color.rgb, additive, atten);
-	color.rgb = scaleSoftClip(color.rgb);
+    //color.rgb = mix(diff.rgb, color.rgb, final_alpha);
+    
+    color.rgb = atmosFragLighting(color.rgb, additive, atten);
+    color.rgb = scaleSoftClip(color.rgb);
 
-	vec4 light = vec4(0,0,0,0);
+    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;
+    LIGHT_LOOP(1)
+    LIGHT_LOOP(2)
+    LIGHT_LOOP(3)
+    LIGHT_LOOP(4)
+    LIGHT_LOOP(5)
+    LIGHT_LOOP(6)
+    LIGHT_LOOP(7)
 
-	// straight to display gamma, we're post-deferred
-	//
-	color.rgb = linear_to_srgb(color.rgb);
+    // keep it linear
+    //
+    color.rgb += light.rgb;
 
 #ifdef WATER_FOG
-	color = applyWaterFogView(pos.xyz, color);
+    color = applyWaterFogView(pos.xyz, color);
 #endif
 #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..3bb59dd7f9
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl
@@ -0,0 +1,93 @@
+/** 
+ * @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 float ssao_radius;
+uniform float ssao_max_radius;
+uniform float ssao_factor;
+uniform float ssao_factor_inv;
+
+vec4 getPosition(vec2 pos_screen);
+
+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 = 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)
+        
+        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/blurLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
index b56abb66d1..868eec3926 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
@@ -48,82 +48,69 @@ 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;
-}
-
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
 vec3 decode_normal (vec2 enc);
 
 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/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
index ec05dab57f..9d7a7f6556 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
@@ -25,29 +25,6 @@
 
 uniform sampler2DRect   normalMap;
 uniform sampler2DRect   depthMap;
-uniform sampler2D       noiseMap;
-uniform sampler2DShadow shadowMap0;
-uniform sampler2DShadow shadowMap1;
-uniform sampler2DShadow shadowMap2;
-uniform sampler2DShadow shadowMap3;
-uniform sampler2DShadow shadowMap4;
-uniform sampler2DShadow shadowMap5;
-
-uniform float ssao_radius;
-uniform float ssao_max_radius;
-uniform float ssao_factor;
-uniform float ssao_factor_inv;
-
-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 spot_shadow_bias;
-uniform float spot_shadow_offset;
 
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
@@ -87,8 +64,6 @@ vec4 getPosition(vec2 pos_screen)
     return pos;
 }
 
-#if USE_DEFERRED_SHADER_API
-
 vec4 getPositionWithDepth(vec2 pos_screen, float depth)
 {
     vec2 sc = getScreenCoordinate(pos_screen);
@@ -98,200 +73,3 @@ vec4 getPositionWithDepth(vec2 pos_screen, float depth)
     pos.w = 1.0;
     return pos;
 }
-
-float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float bias_scale, vec2 pos_screen)
-{
-    stc.xyz /= stc.w;
-    stc.z += shadow_bias * bias_scale;
-        
-    stc.x = floor(stc.x*pos_screen.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;
-}
-
-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 dp_sun = max(0.0, dot(sun_dir.xyz, norm));
-    float dp_moon = max(0.0, dot(moon_dir.xyz, norm));
-    float dp_directional_light = max(dp_sun,dp_moon);
-          dp_directional_light = clamp(dp_directional_light, 0.0, 1.0);
-
-        vec3 light_dir = (dp_moon > dp_sun) ? moon_dir : sun_dir;
-    vec3 offset = light_dir * (1.0-dp_directional_light);
-    vec3 shadow_pos = pos.xyz + (offset * shadow_bias);
-
-    float shadow = 0.0f;
-    vec4 spos = vec4(shadow_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, 0.5, pos_screen)*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, 0.75, pos_screen)*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, 0.88, pos_screen)*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, 1.0, pos_screen)*w;
-            weight += w;
-        }
-
-        shadow /= weight;
-    }
-    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;
-
-        {
-            lpos = shadow_matrix[4 + index]*spos;
-            float w = 1.0;
-            w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
-        
-            shadow += pcfSpotShadow((index == 0) ? shadowMap4 : 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;
-    }
-    return shadow;
-}
-
-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 = 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)
-        
-        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);
-}
-
-#endif
-
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index 0e21e5925d..2db737a427 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -45,9 +45,6 @@ VARYING vec2 vary_texcoord0;
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
-
 vec3 fullbrightAtmosTransportDeferred(vec3 light)
 {
 	return light;
@@ -81,12 +78,9 @@ 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 = applyWaterFogView(pos, vec4(color.rgb, final_alpha));
diff --git a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
index 6ba16b169c..d29e8a9423 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
@@ -40,8 +40,6 @@ uniform sampler2D specularMap;
 
 VARYING vec2 vary_texcoord0;
 
-vec3 linear_to_srgb(vec3 cl);
-
 void main() 
 {
 	vec4 col = texture2D(diffuseMap, vary_texcoord0.xy);
@@ -54,8 +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/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index 7d5ae7c2e7..a0da8563a2 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -25,9 +25,9 @@
  
 /*[EXTRA_CODE_HERE]*/
 
-#define DIFFUSE_ALPHA_MODE_IGNORE	0
-#define DIFFUSE_ALPHA_MODE_BLEND	1
-#define DIFFUSE_ALPHA_MODE_MASK		2
+#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;
@@ -37,10 +37,6 @@ uniform float display_gamma;
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
-
-vec3 atmosFragAmbient(vec3 l, vec3 ambient);
 vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);
 vec3 scaleSoftClipFrag(vec3 l);
 
@@ -66,7 +62,7 @@ uniform vec4 shadow_clip;
 uniform vec2 shadow_res;
 uniform float shadow_bias;
 
-float pcfShadow(sampler2DShadow shadowMap, vec4 stc)
+float pcfShadowLegacy(sampler2DShadow shadowMap, vec4 stc)
 {
 	stc.xyz /= stc.w;
 	stc.z += shadow_bias;
@@ -84,10 +80,11 @@ float pcfShadow(sampler2DShadow shadowMap, vec4 stc)
     return shadow*0.2;
 }
 
+float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float bias_scale, vec2 pos_screen);
 #endif
 
 uniform samplerCube environmentMap;
-uniform sampler2D	  lightFunc;
+uniform sampler2D     lightFunc;
 
 // Inputs
 uniform vec4 morphFactor;
@@ -113,80 +110,80 @@ uniform vec3 light_diffuse[8];
 
 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));	
+    //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;
+    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;
 }
 
 
@@ -234,262 +231,255 @@ vec3 decode_normal (vec2 enc);
 
 void main() 
 {
-	vec4 diffcol = texture2D(diffuseMap, vary_texcoord0.xy);
-	diffcol.rgb *= vertex_color.rgb;
+    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)
-	if (diffcol.a < minimum_alpha)
-	{
-		discard;
-	}
+    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);
+    vec3 gamma_diff = diffcol.rgb;
 #endif
 
 #if HAS_SPECULAR_MAP
-	vec4 spec = texture2D(specularMap, vary_texcoord2.xy);
-	spec.rgb *= specular_color.rgb;
+    vec4 spec = texture2D(specularMap, vary_texcoord2.xy);
+    spec.rgb *= specular_color.rgb;
 #else
-	vec4 spec = vec4(specular_color.rgb, 1.0);
+    vec4 spec = vec4(specular_color.rgb, 1.0);
 #endif
 
 #if HAS_NORMAL_MAP
-	vec4 norm = texture2D(bumpMap, vary_texcoord1.xy);
+    vec4 norm = texture2D(bumpMap, vary_texcoord1.xy);
 
-	norm.xyz = norm.xyz * 2 - 1;
+    norm.xyz = norm.xyz * 2 - 1;
 
-	vec3 tnorm = vec3(dot(norm.xyz,vary_mat0),
-			  dot(norm.xyz,vary_mat1),
-			  dot(norm.xyz,vary_mat2));
+    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;
+    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);
+    vec2 abnormal   = encode_normal(norm.xyz);
+         norm.xyz   = decode_normal(abnormal.xy);
 
-	vec4 final_color = diffcol;
-	
+    vec4 final_color = diffcol;
+    
 #if (DIFFUSE_ALPHA_MODE != DIFFUSE_ALPHA_MODE_EMISSIVE)
-	final_color.a = emissive_brightness;
+    final_color.a = emissive_brightness;
 #else
-	final_color.a = max(final_color.a, emissive_brightness);
+    final_color.a = max(final_color.a, emissive_brightness);
 #endif
 
-	vec4 final_specular = spec;
+    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;
+    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;
+    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;
+        //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;
-	}
+    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 += pcfShadowLegacy(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 += pcfShadowLegacy(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 += pcfShadowLegacy(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 += pcfShadowLegacy(shadowMap0, lpos)*w;
+            weight += w;
+        }
+        
+
+        shadow /= weight;
+    }
+    else
+    {
+        shadow = 1.0;
+    }
 #else
-	float shadow = 1.0;
+    float shadow = 1.0;
 #endif
 
-	spec = final_specular;
-	vec4 diffuse = final_color;
-	float envIntensity = final_normal.z;
+    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;
+    float bloom = 0.0;
         vec3 sunlit;
         vec3 amblit;
         vec3 additive;
         vec3 atten;
 
-	calcFragAtmospherics(pos.xyz, 1.0, sunlit, amblit, additive, atten);
-	
-	vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
+    calcFragAtmospherics(pos.xyz, 1.0, sunlit, amblit, additive, atten);
+    
+    vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
 
-	float sun_da  = dot(norm.xyz, sun_dir.xyz);
-	float moon_da = dot(norm.xyz, moon_dir.xyz);
+    float sun_da  = dot(norm.xyz, sun_dir.xyz);
+    float moon_da = dot(norm.xyz, moon_dir.xyz);
 
     float final_da = max(sun_da,moon_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);
+          final_da = min(final_da, 1.0f);
+          final_da = pow(final_da, display_gamma);
 
-	col.rgb = atmosFragAmbient(col, amblit);
-	
-	float ambient = min(abs(final_da), 1.0);
-	ambient *= 0.5;
-	ambient *= ambient;
-	ambient = (1.0-ambient);
+    col.rgb = (col * 0.5) + amblit;
+    
+    float ambient = min(abs(final_da), 1.0);
+    ambient *= 0.5;
+    ambient *= ambient;
+    ambient = (1.0-ambient);
 
-	col.rgb *= ambient;
+    col.rgb *= ambient;
 
-	col.rgb = col.rgb + (final_da * sunlit);
+    col.rgb = col.rgb + (final_da * sunlit);
 
-	col.rgb *= gamma_diff.rgb;
-	
+    col.rgb *= gamma_diff.rgb;
+    
 
-	float glare = 0.0;
+    float glare = 0.0;
 
-	if (spec.a > 0.0) // specular reflection
-	{
-		// the old infinite-sky shiny reflection
-		//
-				
+    if (spec.a > 0.0) // specular reflection
+    {
+        // the old infinite-sky shiny reflection
+        //
+                
         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);
+        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;
 
-		col += spec_contrib;
-	}
+        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);  
+    col = mix(col.rgb, diffcol.rgb, diffuse.a);
 
-		float cur_glare = max(refcol.r, refcol.g);
-		cur_glare = max(cur_glare, refcol.b);
-		cur_glare *= envIntensity*4.0;
-		glare += cur_glare;
-	}
+    if (envIntensity > 0.0)
+    {
+        //add environmentmap
+        vec3 env_vec = env_mat * refnormpersp;
+        
+        vec3 refcol = textureCube(environmentMap, env_vec).rgb;
 
-	//col = mix(atmosLighting(col), fullbrightAtmosTransport(col), diffuse.a);
-	//col = mix(scaleSoftClip(col), fullbrightScaleSoftClip(col),  diffuse.a);
+        col = mix(col.rgb, refcol, 
+            envIntensity);  
 
-	col = atmosFragLighting(col, additive, atten);
-	col = scaleSoftClipFrag(col);
+        float cur_glare = max(refcol.r, refcol.g);
+        cur_glare = max(cur_glare, refcol.b);
+        cur_glare *= envIntensity*4.0;
+        glare += cur_glare;
+    }
 
-	//convert to linear space before adding local lights
-	col = srgb_to_linear(col);
+    col = atmosFragLighting(col, additive, atten);
 
-	vec3 npos = normalize(-pos.xyz);
-			
-	vec3 light = vec3(0,0,0);
+    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)
+        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;
+    col.rgb += light.rgb;
 
-	glare = min(glare, 1.0);
-	float al = max(diffcol.a,glare)*vertex_color.a;
+    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);
+    col = scaleSoftClipFrag(col);
 
 #ifdef WATER_FOG
-	vec4 temp = applyWaterFogView(pos, vec4(col.rgb, al));
-	col.rgb = temp.rgb;
-	al = temp.a;
+    vec4 temp = applyWaterFogView(pos, vec4(col.rgb, al));
+    col.rgb = temp.rgb;
+    al = temp.a;
 #endif
 
-	frag_color.rgb = col.rgb;
-	frag_color.a   = al;
+    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.
+    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
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
index d1ac19270d..e8eef9b94b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
@@ -59,18 +59,7 @@ uniform mat4 inv_proj;
 
 vec3 decode_normal (vec2 enc);
 
-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() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
index 1d75322b4c..7438fac8fc 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
@@ -73,13 +73,10 @@ uniform vec2 screen_res;
 uniform mat4 inv_proj;
 
 vec3 decode_normal (vec2 enc);
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
 
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 {
 	vec4 ret = texture2DLod(projectionMap, tc, lod);
-	ret.rgb = srgb_to_linear(ret.rgb);
 	
 	vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
 	
@@ -99,7 +96,6 @@ vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 {
 	vec4 ret = texture2DLod(projectionMap, tc, lod);
-	ret.rgb = srgb_to_linear(ret.rgb);
 	
 	vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
 	
@@ -117,7 +113,6 @@ vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 {
 	vec4 ret = texture2DLod(projectionMap, tc, lod);
-	ret.rgb = srgb_to_linear(ret.rgb);
 	
 	vec2 dist = tc-vec2(0.5);
 	
@@ -128,19 +123,7 @@ 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() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
index 13b803e03e..8e756c37bf 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
@@ -58,18 +58,7 @@ uniform vec4 viewport;
 
 vec3 decode_normal (vec2 enc);
 
-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;
-}
+vec4 getPosition(vec2 pos_screen);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
index 8791469675..0b943d2527 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
@@ -40,12 +40,10 @@ VARYING vec2 vary_fragcoord;
 
 uniform float display_gamma;
 
-vec3 linear_to_srgb(vec3 cl);
-
 void main() 
 {
-	vec4 diff = texture2DRect(diffuseRect, vary_fragcoord);
+    vec4 diff = texture2DRect(diffuseRect, vary_fragcoord);
     diff.rgb = pow(diff.rgb, vec3(display_gamma));
-	frag_color = diff;
+    frag_color = diff;
 }
 
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..ae5cb7cbc1
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowUtil.glsl
@@ -0,0 +1,191 @@
+/** 
+ * @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 sampler2D       noiseMap;
+uniform sampler2DShadow shadowMap0;
+uniform sampler2DShadow shadowMap1;
+uniform sampler2DShadow shadowMap2;
+uniform sampler2DShadow shadowMap3;
+uniform sampler2DShadow shadowMap4;
+uniform sampler2DShadow shadowMap5;
+
+uniform float ssao_radius;
+uniform float ssao_max_radius;
+uniform float ssao_factor;
+uniform float ssao_factor_inv;
+
+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 spot_shadow_bias;
+uniform float spot_shadow_offset;
+
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+
+vec3 decode_normal(vec2 enc);
+
+float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float bias_scale, vec2 pos_screen)
+{
+    stc.xyz /= stc.w;
+    stc.z += shadow_bias;
+        
+    stc.x = floor(stc.x*pos_screen.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;
+}
+
+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 dp_sun = max(0.0, dot(sun_dir.xyz, norm));
+    float dp_moon = max(0.0, dot(moon_dir.xyz, norm));
+    float dp_directional_light = max(dp_sun,dp_moon);
+          dp_directional_light = clamp(dp_directional_light, 0.0, 1.0);
+
+        vec3 light_dir = (dp_moon > dp_sun) ? moon_dir : sun_dir;
+    vec3 offset = light_dir * (1.0-dp_directional_light);
+    vec3 shadow_pos = pos.xyz + (offset * shadow_bias);
+
+    float shadow = 0.0f;
+    vec4 spos = vec4(shadow_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, 0.5, pos_screen)*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, 0.75, pos_screen)*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, 0.88, pos_screen)*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, 1.0, pos_screen)*w;
+            weight += w;
+        }
+
+        shadow /= weight;
+    }
+    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;
+
+        {
+            lpos = shadow_matrix[4 + index]*spos;
+            float w = 1.0;
+            w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
+        
+            shadow += pcfSpotShadow((index == 0) ? shadowMap4 : 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;
+    }
+    return shadow;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index 41eb06126b..0de38a3d62 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -66,10 +66,7 @@ uniform vec2 screen_res;
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
 vec3 decode_normal (vec2 enc);
-
 vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);
 vec3 fullbrightAtmosTransportFrag(vec3 l, vec3 additive, vec3 atten);
 void calcFragAtmospherics(vec3 inPositionEye, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten);
@@ -89,18 +86,14 @@ vec4 getPosition_d(vec2 pos_screen, float depth)
     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);
-}
-
+vec4 getPositionWithDepth(vec2 pos_screen, float depth);
+vec4 getPosition(vec2 pos_screen);
 
 void main() 
 {
     vec2 tc = vary_fragcoord.xy;
     float depth = texture2DRect(depthMap, tc.xy).r;
-    vec3 pos = getPosition_d(tc, depth).xyz;
+    vec3 pos = getPositionWithDepth(tc, depth).xyz;
     vec4 norm = texture2DRect(normalMap, tc);
     float envIntensity = norm.z;
     norm.xyz = decode_normal(norm.xy); // unpack norm
@@ -110,13 +103,10 @@ void main()
     float da = max(da_sun, da_moon);
 
     float final_da = clamp(da, 0.0, 1.0);
-          final_da = pow(final_da, global_gamma);
+          final_da = pow(final_da, global_gamma + 0.3);
 
     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;
@@ -173,10 +163,6 @@ void main()
             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;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
index 2b6428963d..22488944cd 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
@@ -71,18 +71,10 @@ uniform vec2 screen_res;
 uniform mat4 inv_proj;
 
 vec3 decode_normal (vec2 enc);
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
-
-vec4 correctWithGamma(vec4 col)
-{
-	return vec4(srgb_to_linear(col.rgb), col.a);
-}
 
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 {
 	vec4 ret = texture2DLod(projectionMap, tc, lod);
-	ret.rgb = srgb_to_linear(ret.rgb);
 	
 	vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
 	
@@ -102,7 +94,6 @@ 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);
 	
 	vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
 	
@@ -120,7 +111,6 @@ 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);
 	
 	vec2 dist = tc-vec2(0.5);
 	
@@ -131,19 +121,7 @@ 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() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/srgb.glsl b/indra/newview/app_settings/shaders/class1/deferred/srgb.glsl
deleted file mode 100644
index bc3324f543..0000000000
--- a/indra/newview/app_settings/shaders/class1/deferred/srgb.glsl
+++ /dev/null
@@ -1,61 +0,0 @@
-/** 
- * @file srgb.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
- * $/LicenseInfo$
- */
-
-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);
-}
-
-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));
-	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);
-}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
index 403df87853..6d65ee2add 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
@@ -41,82 +41,15 @@ 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;
 
 vec3 decode_normal (vec2 enc);
-
-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;
-}
-
-//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);
-}
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
+float calcAmbientOcclusion(vec4 pos, vec3 norm, vec2 pos_screen);
 
 void main() 
 {
@@ -124,13 +57,11 @@ 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[2] = 1.0; 
-	frag_color[3] = 1.0;
+	frag_color.r = 1.0;
+	frag_color.g = calcAmbientOcclusion(pos, norm, pos_screen);
+	frag_color.b = 1.0; 
+	frag_color.a = 1.0;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl b/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
index db1eab23fb..e95a688e1f 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
@@ -58,9 +58,6 @@ VARYING vec4 refCoord;
 VARYING vec4 littleWave;
 VARYING vec4 view;
 
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
-
 vec2 encode_normal(vec3 n);
 
 vec4 applyWaterFog(vec4 color, vec3 viewVec)
diff --git a/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
index 69543b93ea..9da2548586 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
@@ -62,7 +62,6 @@ VARYING vec4 littleWave;
 VARYING vec4 view;
 VARYING vec4 vary_position;
 
-vec3 srgb_to_linear(vec3 cs);
 vec2 encode_normal(vec3 n);
 vec3 scaleSoftClipFrag(vec3 l);
 
diff --git a/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
index f98b3a5edf..4a8b892c3a 100644
--- a/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
@@ -64,3 +64,21 @@ 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/windlight/atmosphericsF.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl
index 8b7c4f2ecf..4f0e2a6cb6 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