Move to using a shared deferredUtil object for getting pos/norm from gbuffer.

Eliminate 20+ callsites with copy-paste of getPosition and/or getNorm code.

Make pipeline use getShadowTarget/releaseShadowTarget consistently.

46 files changed, 538 insertions, 922 deletions

diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index de15d1d75b..585f8f6504 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -81,6 +81,9 @@ LLShaderFeatures::LLShaderFeatures()
     , hasSrgb(false)
     , encodesNormal(false)
     , decodesNormal(false)
+    , isDeferred(false)
+    , hasIndirect(false)
+    , hasShadows(false)
     , mIndexedTextureChannels(0)
     , disableTextureIndex(false)
     , hasAlphaMask(false)
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index 0934ceba30..ed13106bfd 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -48,9 +48,12 @@ public:
 	bool hasObjectSkinning;
 	bool hasAtmospherics;
 	bool hasGamma;
+    bool hasShadows;
 	bool hasSrgb;
     bool encodesNormal;
     bool decodesNormal;
+    bool isDeferred;
+    bool hasIndirect;
 	S32 mIndexedTextureChannels;
 	bool disableTextureIndex;
 	bool hasAlphaMask;
@@ -227,5 +230,4 @@ extern LLGLSLShader			gSolidColorProgram;
 //Alpha mask shader (declared here so llappearance can access properly)
 extern LLGLSLShader			gAlphaMaskProgram;
 
-
 #endif
diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index d6fe35e2ca..55e4ecda2a 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -186,15 +186,23 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 		}
 	}
 
-    if (features->calculatesLighting || features->calculatesAtmospherics)
+	// NOTE order of shader object attaching is VERY IMPORTANT!!!
+    if (features->isDeferred || features->hasShadows)
 	{
-		if (!shader->attachObject("windlight/atmosphericsHelpersF.glsl"))
+		if (!shader->attachObject("deferred/deferredUtil.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+    if (features->hasIndirect)
+	{
+		if (!shader->attachObject("deferred/indirect.glsl"))
 		{
 			return FALSE;
 		}
 	}
 
-	// NOTE order of shader object attaching is VERY IMPORTANT!!!
 	if (features->hasGamma)
 	{
 		if (!shader->attachObject("windlight/gammaF.glsl"))
diff --git a/indra/newview/app_settings/shaders/class1/avatar/avatarSkinV.glsl b/indra/newview/app_settings/shaders/class1/avatar/avatarSkinV.glsl
index 767fad016c..c4caed4d71 100644
--- a/indra/newview/app_settings/shaders/class1/avatar/avatarSkinV.glsl
+++ b/indra/newview/app_settings/shaders/class1/avatar/avatarSkinV.glsl
@@ -38,12 +38,5 @@ mat4 getSkinnedTransform()
 	ret[1] = mix(matrixPalette[i+15],matrixPalette[i+16], x);
 	ret[2] = mix(matrixPalette[i+30],matrixPalette[i+31], x);
 	ret[3] = vec4(0,0,0,1);
-
 	return ret;
-
-#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.
-	vec4 dummy1 = matrixPalette[0];
-	vec4 dummy2 = matrixPalette[44];
-#endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/avatar/objectSkinV.glsl b/indra/newview/app_settings/shaders/class1/avatar/objectSkinV.glsl
index 90bf2851c9..94de2f7b53 100644
--- a/indra/newview/app_settings/shaders/class1/avatar/objectSkinV.glsl
+++ b/indra/newview/app_settings/shaders/class1/avatar/objectSkinV.glsl
@@ -61,12 +61,5 @@ mat4 getObjectSkinnedTransform()
 	ret[3] = vec4(trans, 1.0);
 				
 	return ret;
-
-#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.
-   mat3x4 dummy1 = matrixPalette[0];
-   mat3x4 dummy2 = matrixPalette[MAX_JOINTS_PER_MESH_OBJECT-1];
-#endif
-
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index 3ec2ea12da..a325faaad7 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -89,9 +89,7 @@ vec2 encode_normal (vec3 n);
 vec3 decode_normal (vec2 enc);
 
 vec3 scaleSoftClipFrag(vec3 l);
-vec3 atmosFragAmbient(vec3 light, vec3 sunlit);
 vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten);
-vec3 atmosFragAffectDirectionalLight(float light, vec3 sunlit);
 void calcFragAtmospherics(vec3 inPositionEye, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 atten, out vec3 additive);
 
 vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 diffuse, vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight)
@@ -164,6 +162,8 @@ void main()
 	
 	float shadow = 1.0;
 
+    vec3 norm = vary_norm; 
+
 #if HAS_SHADOW
 	vec4 spos = pos;
 		
@@ -268,13 +268,10 @@ void main()
 	vec4 gamma_diff = diff;	
 	diff.rgb = srgb_to_linear(diff.rgb);
 
-	vec3 norm = vary_norm; 
-
-        vec3 sunlit;
-        vec3 amblit;
-        vec3 additive;
-        vec3 atten;
-
+    vec3 sunlit;
+    vec3 amblit;
+    vec3 additive;
+    vec3 atten;
 	calcFragAtmospherics(pos.xyz, 1.0, sunlit, amblit, additive, atten);
 
 	vec2 abnormal	= encode_normal(norm.xyz);
@@ -290,7 +287,7 @@ void main()
 
 	vec4 color = vec4(0,0,0,0);
 
-	color.rgb = atmosFragAmbient(color.rgb, amblit);
+	color.rgb = (color.rgb * 0.5) + amblit;
 	color.a   = final_alpha;
 
 	float ambient = abs(da);
@@ -299,7 +296,7 @@ void main()
 	ambient = (1.0-ambient);
 
 	color.rgb *= ambient;
-	color.rgb += atmosFragAffectDirectionalLight(final_da, sunlit);
+	color.rgb += (final_da * sunlit);
 	color.rgb *= gamma_diff.rgb;
 
 	//color.rgb = mix(diff.rgb, color.rgb, final_alpha);
diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaV.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaV.glsl
index 506118d381..394ae80e53 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaV.glsl
@@ -73,7 +73,7 @@ void main()
 	vec3 norm;
 	
 	//transform vertex
-#ifdef HAS_SKIN
+#if defined(HAS_SKIN)
 	mat4 trans = getObjectSkinnedTransform();
 	trans = modelview_matrix * trans;
 	
@@ -83,9 +83,7 @@ void main()
 	norm = normalize((trans * vec4(norm, 1.0)).xyz - pos.xyz);
 	vec4 frag_pos = projection_matrix * pos;
 	gl_Position = frag_pos;
-#else
-
-#ifdef IS_AVATAR_SKIN
+#elif defined(IS_AVATAR_SKIN)
 	mat4 trans = getSkinnedTransform();
 	vec4 pos_in = vec4(position.xyz, 1.0);
 	pos.x = dot(trans[0], pos_in);
@@ -107,14 +105,11 @@ void main()
 	gl_Position = modelview_projection_matrix*vec4(position.xyz, 1.0);
 #endif
 	
-#endif
-
 #ifdef USE_INDEXED_TEX
 	passTextureIndex();
 #endif
 
 	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
-	
 	vary_norm = norm;
 	vary_position = pos.xyz;
 
@@ -122,18 +117,14 @@ void main()
 	vertex_color = diffuse_color;
 #endif
 	
-#ifdef HAS_SKIN
+#if defined(HAS_SKIN)
 	vary_fragcoord.xyz = frag_pos.xyz + vec3(0,0,near_clip);
-#else
-
-#ifdef IS_AVATAR_SKIN
+#elif defined(IS_AVATAR_SKIN)
 	vary_fragcoord.xyz = pos.xyz + vec3(0,0,near_clip);
 #else
 	pos = modelview_projection_matrix * vert;
 	vary_fragcoord.xyz = pos.xyz + vec3(0,0,near_clip);
 #endif
 	
-#endif
-
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
index b56abb66d1..7c9382d474 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;
 
@@ -45,22 +44,7 @@ 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;
-}
-
+vec4 getPosition(vec2 pos_screen);
 vec3 decode_normal (vec2 enc);
 
 void main() 
@@ -119,11 +103,5 @@ void main()
 	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];
-#endif
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
index 6ba16b169c..def149d86d 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
@@ -32,11 +32,9 @@ out vec4 frag_data[3];
 #endif
 
 uniform float minimum_alpha;
-
-
 uniform sampler2D diffuseMap;
-uniform sampler2D normalMap;
 uniform sampler2D specularMap;
+uniform sampler2D normalMap;
 
 VARYING vec2 vary_texcoord0;
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index c1c17532b8..1e566b77bf 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -40,7 +40,6 @@ vec4 applyWaterFogView(vec3 pos, vec4 color);
 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);
 
@@ -176,19 +175,6 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spe
 
 }
 
-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;
-}
-
-
 #else
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
@@ -233,6 +219,8 @@ vec3 decode_normal (vec2 enc);
 
 void main() 
 {
+    vec2 pos_screen = vary_texcoord0.xy;
+
 	vec4 diffcol = texture2D(diffuseMap, vary_texcoord0.xy);
 	diffcol.rgb *= vertex_color.rgb;
 
@@ -390,7 +378,7 @@ void main()
 		  final_da = min(final_da, 1.0f);
 		  final_da = pow(final_da, 1.0/1.3);
 
-	col.rgb = atmosFragAmbient(col, amblit);
+	col.rgb = (col * 0.5) + amblit;
 	
 	float ambient = min(abs(da), 1.0);
 	ambient *= 0.5;
@@ -444,9 +432,6 @@ void main()
 		glare += cur_glare;
 	}
 
-	//col = mix(atmosLighting(col), fullbrightAtmosTransport(col), diffuse.a);
-	//col = mix(scaleSoftClip(col), fullbrightScaleSoftClip(col),  diffuse.a);
-
 	col = atmosFragLighting(col, additive, atten);
 	col = scaleSoftClipFrag(col);
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
index d1ac19270d..eb65c28645 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() 
 {
@@ -148,12 +137,4 @@ void main()
 	
 	frag_color.rgb = out_col;
 	frag_color.a = 0.0;
-
-#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.
-	vec4 dummy1 = light[0];
-	vec4 dummy2 = light_col[0];
-	vec4 dummy3 = light[LIGHT_COUNT-1];
-	vec4 dummy4 = light_col[LIGHT_COUNT-1];
-#endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
index 1d75322b4c..3aa7a3a449 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
@@ -128,19 +128,7 @@ 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..df48a66fab 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
@@ -57,19 +57,7 @@ uniform mat4 inv_proj;
 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/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/postgiF.glsl b/indra/newview/app_settings/shaders/class1/deferred/postgiF.glsl
index e33254304b..c2963046c5 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postgiF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postgiF.glsl
@@ -49,18 +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() 
 {
@@ -101,10 +90,4 @@ void main()
 	col = col*col*blur_quad.x + col*blur_quad.y + blur_quad.z;
 	
 	frag_color.rgb = 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.
-	vec2 dummy1 = kern[0];
-	vec2 dummy2 = kern[31];
-#endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index 5627275df6..cac3e75f1f 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -69,33 +69,17 @@ vec3 srgb_to_linear(vec3 cs);
 vec3 linear_to_srgb(vec3 cl);
 vec3 decode_normal (vec2 enc);
 
+vec3 scaleSoftClipFrag(vec3 l);
 vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);
 void calcFragAtmospherics(vec3 inPositionEye, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten);
 
-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);
-}
-
+vec4 getPositionWithDepth(vec2 pos_screen, float depth);
 
 void main() 
 {
 	vec2 tc = vary_fragcoord.xy;
 	float depth = texture2DRect(depthMap, tc.xy).r;
-	vec3 pos = getPosition_d(tc, depth).xyz;
+	vec4 pos = getPositionWithDepth(tc, depth);
 	vec4 norm = texture2DRect(normalMap, tc);
 	float envIntensity = norm.z;
 	norm.xyz = decode_normal(norm.xy); // unpack norm
@@ -156,27 +140,25 @@ void main()
 		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, refcol, envIntensity);  
 		}
 				
 		if (norm.w < 0.5)
 		{
 			col = atmosFragLighting(col, additive, atten);
+			col = scaleSoftClipFrag(col);
 		}
 
 		#ifdef WATER_FOG
-			vec4 fogged = applyWaterFogView(pos,vec4(col, bloom));
+			vec4 fogged = applyWaterFogView(pos.xyz,vec4(col, bloom));
 			col = fogged.rgb;
 			bloom = fogged.a;
 		#endif
 
 		col = srgb_to_linear(col);
 
+		//col = vec3(1,0,1);
 		//col.g = envIntensity;
 	}
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl
index b59fcbe017..5655c6f99f 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightV.glsl
@@ -30,6 +30,7 @@ ATTRIBUTE vec3 position;
 uniform vec2 screen_res;
 
 VARYING vec2 vary_fragcoord;
+
 void main()
 {
 	//transform vertex
diff --git a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
index 2b6428963d..022bcbabca 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
@@ -132,18 +132,7 @@ vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 }
 
 
-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
index 00ba0e8fad..bc3324f543 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/srgb.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/srgb.glsl
@@ -48,7 +48,6 @@ vec3 srgb_to_linear(vec3 cs)
 
 	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
 	return mix(high_range, low_range, lte);
-
 }
 
 vec3 linear_to_srgb(vec3 cl)
@@ -59,6 +58,4 @@ vec3 linear_to_srgb(vec3 cl)
 
 	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..006a49d9a0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
@@ -35,102 +35,26 @@ 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;
-
 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;
-}
+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() 
 {
-	vec2 pos_screen = vary_fragcoord.xy;
-	
-	//try doing an unproject here
-	
-	vec4 pos = getPosition(pos_screen);
-	
-	vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
-	norm = decode_normal(norm.xy);
-		
+	vec2 pos_screen = vary_fragcoord.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/waterF.glsl b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
index 73f6d9fec3..69543b93ea 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
@@ -41,15 +41,6 @@ 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;
diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl
index c1cc3679a7..2b8cf9d8df 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsF.glsl
@@ -23,21 +23,10 @@
  * $/LicenseInfo$
  */
  
-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;
+	/* stub function for fallback compatibility on class1 hardware */
+   return light;
 }
 
 vec3 atmosLighting(vec3 light)
diff --git a/indra/newview/app_settings/shaders/class1/windlight/transportF.glsl b/indra/newview/app_settings/shaders/class1/windlight/transportF.glsl
index ebce9ea91d..e2b391cb7a 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
@@ -25,6 +25,24 @@
 
 uniform int no_atmo;
 
+vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+	return light;
+}
+
+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
+}
+
+vec3 fullbrightShinyAtmosTransportFrag(vec3 light, vec3 atten, vec3 additive)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
+}
+
 vec3 atmosTransport(vec3 light)
 {
 	/* stub function for fallback compatibility on class1 hardware */
@@ -33,11 +51,12 @@ vec3 atmosTransport(vec3 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;
 }
-
diff --git a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
index 864ba4859d..0848adba73 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
@@ -133,18 +133,7 @@ vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 }
 
 
-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/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
index c92dbda185..33f3eb46c0 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
@@ -83,51 +83,12 @@ vec3 atmosFragLighting(vec3 l, vec3 additive, vec3 atten);
 vec3 fullbrightScaleSoftClipFrag(vec3 l);
 vec3 scaleSoftClipFrag(vec3 l);
 
-vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
-{
-    if (no_atmo == 1)
-    {
-        return light;
-    }
-	return (light + additive) * atten.r * 2.0;
-}
-
-vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten) {
-    if (no_atmo == 1)
-    {
-        return light;
-    }
-	float brightness = dot(light.rgb, vec3(0.33333));
-	return mix(atmosTransportFrag(light.rgb, additive, atten), light.rgb + additive.rgb, brightness * brightness);
-}
-
-vec3 fullbrightShinyAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten) {
-    if (no_atmo == 1)
-    {
-        return light;
-    }
-	float brightness = dot(light.rgb, vec3(0.33333));
-	return mix(atmosTransportFrag(light.rgb, additive, atten), (light.rgb + additive.rgb) * (2.0 - brightness), brightness * brightness);
-}
-
-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).r;
-	return getPosition_d(pos_screen, depth);
-}
+vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
+vec3 fullbrightShinyAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
 
+vec4 getPositionWithDepth(vec2 pos_screen, float depth);
+vec4 getPosition(vec2 pos_screen);
 
 #ifdef WATER_FOG
 vec4 applyWaterFogView(vec3 pos, vec4 color);
@@ -137,7 +98,7 @@ void main()
 {
 	vec2 tc = vary_fragcoord.xy;
 	float depth = texture2DRect(depthMap, tc.xy).r;
-	vec3 pos = getPosition_d(tc, depth).xyz;
+	vec4 pos = getPositionWithDepth(tc, depth);
 	vec4 norm = texture2DRect(normalMap, tc);
 	float envIntensity = norm.z;
 	norm.xyz = decode_normal(norm.xy); // unpack norm
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightV.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightV.glsl
index c840d72784..8b8b338f68 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightV.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightV.glsl
@@ -36,7 +36,5 @@ 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;
 }
diff --git a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
index a7da140b31..80e2a9dd55 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
@@ -133,18 +133,7 @@ vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 }
 
 
-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/class2/deferred/sunLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl
index aa5e99a2f7..c4018ca61a 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightF.glsl
@@ -67,20 +67,9 @@ uniform float shadow_offset;
 uniform float spot_shadow_bias;
 uniform float spot_shadow_offset;
 
+vec3 getNorm(vec2 pos_screen);
 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);
 
 float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
 {
@@ -123,14 +112,9 @@ float pcfSpotShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_scr
 
 void main() 
 {
-	vec2 pos_screen = vary_fragcoord.xy;
-	
-	//try doing an unproject here
-	
-	vec4 pos = getPosition(pos_screen);
-	
-	vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
+	vec2 pos_screen = vary_fragcoord.xy;	
+	vec4 pos        = getPosition(pos_screen);
+	vec3 norm       = getNorm(pos_screen);
 		
 	/*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL
 	{
diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
index 58f3f2f91e..bd468306ee 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
@@ -70,79 +70,10 @@ uniform float spot_shadow_offset;
 
 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;
-}
-
-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)
-{
-	float ret = 1.0;
-
-	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;
-	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));
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
 
-	ret = max(ret, 0.0);
-	return min(ret, 1.0);
-}
+float calcAmbientOcclusion(vec4 pos, vec3 norm, vec2 pos_screen);
 
 float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
 {
@@ -185,13 +116,8 @@ float pcfSpotShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_scr
 void main() 
 {
 	vec2 pos_screen = vary_fragcoord.xy;
-	
-	//try doing an unproject here
-	
-	vec4 pos = getPosition(pos_screen);
-	
-	vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
+	vec4 pos  = getPosition(pos_screen);
+	vec3 norm = getNorm(pos_screen);
 		
 	/*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL
 	{
@@ -291,7 +217,7 @@ void main()
 	}
 	
 	frag_color[0] = shadow;
-	frag_color[1] = calcAmbientOcclusion(pos, norm);
+	frag_color[1] = calcAmbientOcclusion(pos, norm, pos_screen);
 	
 	spos = vec4(shadow_pos+norm*spot_shadow_offset, 1.0);
 	
diff --git a/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl b/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl
index bf64605014..75d1bb0cd5 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl
@@ -32,7 +32,7 @@ vec3 getAtmosAttenuation();
 
 uniform int no_atmo;
 
-vec3 atmosFragTransport(vec3 light, vec3 atten, vec3 additive)
+vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
 {
     if (no_atmo == 1)
     {
@@ -41,32 +41,36 @@ vec3 atmosFragTransport(vec3 light, vec3 atten, vec3 additive)
     return (light + additive) * atten * 2.0;
 }
 
-vec3 fullbrightFragAtmosTransport(vec3 light, vec3 atten, vec3 additive) {
+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
+{
     if (no_atmo == 1)
     {
         return light;
     }
 	float brightness = dot(light.rgb, vec3(0.33333));
-	return mix(atmosFragTransport(light.rgb, atten, additive), light.rgb + additive.rgb, brightness * brightness);
+	return mix(atmosTransportFrag(light.rgb, additive, atten), light.rgb + additive.rgb, brightness * brightness);
 }
 
-vec3 fullbrightFragShinyAtmosTransport(vec3 light, vec3 atten, vec3 additive) {
+vec3 fullbrightShinyAtmosTransportFrag(vec3 light, vec3 atten, vec3 additive) {
     if (no_atmo == 1)
     {
         return light;
     }
 	float brightness = dot(light.rgb, vec3(0.33333));
-	return mix(atmosFragTransport(light.rgb, atten, additive), (light.rgb + additive.rgb) * (2.0 - brightness), brightness * brightness);
+	return mix(atmosTransportFrag(light.rgb, additive, atten), (light.rgb + additive.rgb) * (2.0 - brightness), brightness * brightness);
 }
 
-vec3 atmosTransport(vec3 light) {
-     return (no_atmo == 1) ? light : atmosFragTransport(light, getAtmosAttenuation(), getAdditiveColor());
+vec3 atmosTransport(vec3 light)
+{
+     return atmosTransportFrag(light, getAdditiveColor(), getAtmosAttenuation());
 }
 
-vec3 fullbrightAtmosTransport(vec3 light) {
-     return (no_atmo == 1) ? light : fullbrightFragAtmosTransport(light, getAtmosAttenuation(), getAdditiveColor());
+vec3 fullbrightAtmosTransport(vec3 light)
+{
+     return fullbrightAtmosTransportFrag(light,getAdditiveColor(), getAtmosAttenuation());
 }
 
-vec3 fullbrightShinyAtmosTransport(vec3 light) {
-    return (no_atmo == 1) ? light : fullbrightFragShinyAtmosTransport(light, getAtmosAttenuation(), getAdditiveColor());
+vec3 fullbrightShinyAtmosTransport(vec3 light)
+{
+    return fullbrightShinyAtmosTransportFrag(light,getAdditiveColor(), getAtmosAttenuation());
 }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/cloudsF.glsl b/indra/newview/app_settings/shaders/class3/deferred/cloudsF.glsl
index 9f06319da3..f8373215f0 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/cloudsF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/cloudsF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file WLCloudsF.glsl
+ * @file class3/deferred/cloudsF.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -24,9 +24,9 @@
  */
  
 #ifdef DEFINE_GL_FRAGCOLOR
-out vec4 frag_color;
+out vec4 frag_data[3];
 #else
-#define frag_color gl_FragColor
+#define frag_data gl_FragData
 #endif
 
 /////////////////////////////////////////////////////////////////////////
@@ -36,20 +36,37 @@ out vec4 frag_color;
 VARYING vec4 vary_CloudColorSun;
 VARYING vec4 vary_CloudColorAmbient;
 VARYING float vary_CloudDensity;
+VARYING vec2 vary_texcoord0;
+VARYING vec2 vary_texcoord1;
+VARYING vec2 vary_texcoord2;
+VARYING vec2 vary_texcoord3;
+VARYING vec3 vary_pos;
 
 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 vec4 sunlight_color;
+uniform vec4 cloud_color;
+uniform float cloud_shadow;
 uniform float cloud_scale;
 uniform float cloud_variance;
-
-VARYING vec2 vary_texcoord0;
-VARYING vec2 vary_texcoord1;
-VARYING vec2 vary_texcoord2;
-VARYING vec2 vary_texcoord3;
+uniform vec3 ambient;
+uniform vec3 camPosLocal;
+uniform vec3 sun_dir;
+uniform float sun_size;
+uniform float far_z;
+
+uniform sampler2D transmittance_texture;
+uniform sampler3D scattering_texture;
+uniform sampler3D single_mie_scattering_texture;
+uniform sampler2D irradiance_texture;
+uniform sampler2D sh_input_r;
+uniform sampler2D sh_input_g;
+uniform sampler2D sh_input_b;
+
+vec3 GetSkyLuminance(vec3 camPos, vec3 view_dir, float shadow_length, vec3 dir, out vec3 transmittance);
 
 /// Soft clips the light with a gamma correction
 vec3 scaleSoftClip(vec3 light);
@@ -67,11 +84,9 @@ 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;
+	float cloudDensity = 2.0 * (cloud_shadow - 0.25);
+
 	vec2 uv4 = vary_texcoord3.xy;
 
     vec2 disturbance = vec2(cloudNoise(uv1 / 16.0f).x, cloudNoise((uv3 + uv1) / 16.0f).x) * cloud_variance * (1.0f - cloud_scale * 0.25f);
@@ -82,33 +97,53 @@ void main()
 	uv3 += cloud_pos_density2.xy + disturbance;	//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));
 
-	// Compute alpha1, the main cloud opacity
+    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. + disturbance.y) * cloud_pos_density1.z, 1.);
+	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 + disturbance.x) * cloud_pos_density1.z, 1.);
+	alpha2 = min(max(alpha2 + cloudDensity, 0.) * 2.5 * cloud_pos_density1.z, 1.);
 
 	// And smooth
 	alpha2 = 1. - alpha2;
 	alpha2 = 1. - alpha2 * alpha2;	
 
+    vec3 view_ray = vary_pos.xyz + camPosLocal;
+
+    vec3 view_direction = normalize(view_ray);
+    vec3 sun_direction  = normalize(sun_dir);
+    vec3 earth_center   = vec3(0, 0, -6360.0f);
+    vec3 camPos = (camPosLocal / 1000.0f) - earth_center;
+
+    vec3 transmittance;
+    vec3 radiance_sun  = GetSkyLuminance(camPos, view_direction, 1.0 - alpha1, sun_direction, transmittance);
+
+    vec3 sun_color = vec3(1.0) - exp(-radiance_sun * 0.0001);
+
 	// Combine
 	vec4 color;
-	color = (cloudColorSun*(1.-alpha2) + cloudColorAmbient);
-	color *= 2.;
 
-	/// Gamma correct for WL (soft clip effect).
-	frag_color.rgb = scaleSoftClip(color.rgb);
-	frag_color.a = alpha1;
+    color.rgb = sun_color * cloud_color.rgb * (1. - alpha2);
+    color.rgb = pow(color.rgb, vec3(1.0 / 2.2));
+    color.rgb += ambient;
+
+	frag_data[0] = vec4(color.rgb, alpha1);
+	frag_data[1] = vec4(0);
+	frag_data[2] = vec4(0,1,0,1);
 }
 
diff --git a/indra/newview/app_settings/shaders/class3/deferred/cloudsV.glsl b/indra/newview/app_settings/shaders/class3/deferred/cloudsV.glsl
index c1dd45cd67..53b6d88ef5 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/cloudsV.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/cloudsV.glsl
@@ -24,6 +24,7 @@
  */
 
 uniform mat4 modelview_projection_matrix;
+uniform mat4 modelview_matrix;
 
 ATTRIBUTE vec3 position;
 ATTRIBUTE vec2 texcoord0;
@@ -33,158 +34,37 @@ ATTRIBUTE vec2 texcoord0;
 ///////////////////////////////////////////////////////////////////////////////
 
 // Output parameters
-VARYING vec4 vary_CloudColorSun;
-VARYING vec4 vary_CloudColorAmbient;
-VARYING float vary_CloudDensity;
 VARYING vec2 vary_texcoord0;
 VARYING vec2 vary_texcoord1;
 VARYING vec2 vary_texcoord2;
 VARYING vec2 vary_texcoord3;
+VARYING vec3 vary_pos;
 
 // Inputs
-uniform vec3 camPosLocal;
-
-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 max_y;
-
-uniform vec4 glow;
-
-uniform vec4 cloud_color;
-
 uniform float cloud_scale;
+uniform vec4  lightnorm;
+uniform vec3  camPosLocal;
 
 void main()
 {
+    vary_pos = position;
 
 	// World / view / projection
 	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
 
-	vary_texcoord0 = texcoord0;
-
-	// Get relative position
-	vec3 P = position.xyz - camPosLocal.xyz + vec3(0,50,0);
-
-	// Set altitude
-	if (P.y > 0.)
-	{
-		P *= (max_y / P.y);
-	}
-	else
-	{
-		P *= (-32000. / P.y);
-	}
-
-	// Can normalize then
-	vec3 Pn = normalize(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 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);
-
-	// Calculate relative weights
-	temp1 = blue_density + 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);
-
-	// Distance
-	temp2.z = Plen * density_multiplier;
-
-	// Transparency (-> temp1)
-	// 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);
-	temp2.x = 1. - temp2.x;
-		// temp2.x is 0 at the sun and increases away from sun
-	temp2.x = max(temp2.x, .001);	
-		// 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;
-	tmpAmbient += (1. - tmpAmbient) * cloud_shadow * 0.5; 
-
-	// Dim sunlight by cloud shadow percentage
-	sunlight *= (1. - cloud_shadow);
-
-	// Haze color below cloud
-	vec4 additiveColorBelowCloud = (	  blue_horizon * blue_weight * (sunlight + tmpAmbient)
-				+ (haze_horizon * haze_weight) * (sunlight * temp2.x + tmpAmbient)
-			 );	
-
-	// CLOUDS
-
-	sunlight = sunlight_color;
-	temp2.y = max(0., lightnorm.y * 2.);
-	temp2.y = 1. / temp2.y;
-	sunlight *= exp( - light_atten * temp2.y);
-
-	// Cloud color out
-	vary_CloudColorSun = (sunlight * temp2.x) * cloud_color;
-	vary_CloudColorAmbient = tmpAmbient * cloud_color;
-	
-	// Attenuate cloud color by atmosphere
-	temp1 = sqrt(temp1);	//less atmos opacity (more transparency) below clouds
-	vary_CloudColorSun *= temp1;
-	vary_CloudColorAmbient *= temp1;
-	vec4 oHazeColorBelowCloud = additiveColorBelowCloud * (1. - temp1);
-
-	// Make a nice cloud density based on the cloud_shadow value that was passed in.
-	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_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_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;
-
-	// needs this to compile on mac
-	//vary_AtmosAttenuation = vec3(0.0,0.0,0.0);
-
 	// END CLOUDS
 }
 
diff --git a/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
index 864ba4859d..0848adba73 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
@@ -133,18 +133,7 @@ vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 }
 
 
-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/class3/deferred/skyF.glsl b/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl
index 2073fc066f..d0514f7d23 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file class3/skyF.glsl
+ * @file class3/deferred/skyF.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -44,6 +44,7 @@ uniform sampler3D single_mie_scattering_texture;
 uniform sampler2D irradiance_texture;
 uniform sampler2D rainbow_map;
 uniform sampler2D halo_map;
+uniform vec4 gamma;
 
 uniform float moisture_level;
 uniform float droplet_radius;
@@ -53,6 +54,7 @@ vec3 GetSolarLuminance();
 vec3 GetSkyLuminance(vec3 camPos, vec3 view_dir, float shadow_length, vec3 dir, out vec3 transmittance);
 vec3 GetSkyLuminanceToPoint(vec3 camPos, vec3 pos, float shadow_length, vec3 dir, out vec3 transmittance);
 
+vec3 ColorFromRadiance(vec3 radiance);
 vec3 rainbow(float d)
 {
    float rad = (droplet_radius - 5.0f) / 1024.0f;
@@ -93,18 +95,15 @@ void main()
     }
     s = smoothstep(0.9, 1.0, s) * 16.0f;
 
-    vec3 color = vec3(1.0) - exp(-radiance_sun * 0.0001);
+    vec3 color = ColorFromRadiance(radiance_sun);
 
     float optic_d = dot(view_direction, sun_direction);
-
     vec3 halo_22 = halo22(optic_d);
 
-    if (optic_d <= 0)
-    color.rgb += rainbow(optic_d);
-
+    color.rgb += rainbow(optic_d) * optic_d;
     color.rgb += halo_22;
 
-    color = pow(color, vec3(1.0 / 2.2));
+    color = pow(color, vec3(1.0/2.2));
 
     frag_data[0] = vec4(color, 1.0 + s);
     frag_data[1] = vec4(0.0);
diff --git a/indra/newview/app_settings/shaders/class3/deferred/skyV.glsl b/indra/newview/app_settings/shaders/class3/deferred/skyV.glsl
index a5cc49ca30..2eb222ada4 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/skyV.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/skyV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file advancedAtmoV.glsl
+ * @file class3/deferred/skyV.glsl
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -23,12 +23,6 @@
  * $/LicenseInfo$
  */
  
-uniform vec3 cameraPosLocal;
-uniform mat4 modelview_projection_matrix;
-uniform mat4 modelview_matrix;
-uniform mat4 inv_proj;
-uniform mat4 inv_modelview;
-
 ATTRIBUTE vec3 position;
 ATTRIBUTE vec2 texcoord0;
 
diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
index 2615400e52..ecf6858136 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -38,30 +38,21 @@ uniform sampler2DRect specularRect;
 uniform sampler2DRect normalMap;
 uniform sampler2DRect lightMap;
 uniform sampler2DRect depthMap;
-uniform samplerCube environmentMap;
-uniform sampler2D	  lightFunc;
+uniform sampler2D     lightFunc;
 
 uniform float blur_size;
+uniform samplerCube environmentMap;
+
 uniform float blur_fidelity;
 
 // Inputs
 uniform vec4 morphFactor;
 uniform vec3 camPosLocal;
-//uniform vec4 camPosWorld;
 uniform vec4 gamma;
-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 vec4 shadow_clip;
 uniform mat3 ssao_effect_mat;
@@ -74,28 +65,29 @@ uniform mat4 inv_modelview;
 
 uniform vec2 screen_res;
 
+uniform sampler2D transmittance_texture;
+uniform sampler3D scattering_texture;
+uniform sampler3D single_mie_scattering_texture;
+uniform sampler2D irradiance_texture;
+
+uniform sampler2D sh_input_r;
+uniform sampler2D sh_input_g;
+uniform sampler2D sh_input_b;
+
+vec3 GetSunAndSkyIrradiance(vec3 camPos, vec3 norm, vec3 dir, out vec3 sky_irradiance);
+vec3 GetSkyLuminance(vec3 camPos, vec3 view_dir, float shadow_length, vec3 dir, out vec3 transmittance);
+vec3 GetSkyLuminanceToPoint(vec3 camPos, vec3 pos, float shadow_length, vec3 dir, out vec3 transmittance);
+
+vec3 scaleSoftClipFrag(vec3 c);
+vec3 fullbrightScaleSoftClipFrag(vec3 c);
 vec3 srgb_to_linear(vec3 cs);
 vec3 linear_to_srgb(vec3 cl);
 vec3 decode_normal (vec2 enc);
 
-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).r;
-	return getPosition_d(pos_screen, depth);
-}
-
+vec3 ColorFromRadiance(vec3 radiance);
+vec4 getPositionWithDepth(vec2 pos_screen, float depth);
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
 
 #ifdef WATER_FOG
 vec4 applyWaterFogView(vec3 pos, vec4 color);
@@ -105,24 +97,22 @@ 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
-		
+    norm.xyz = decode_normal(norm.xy);
+
 	float da = max(dot(norm.xyz, sun_dir.xyz), 0.0);
 
 	float light_gamma = 1.0/1.3;
-	da = pow(da, light_gamma);
 
-	vec4 diffuse = texture2DRect(diffuseRect, tc);
+	vec4 diffuse = texture2DRect(diffuseRect, tc); // linear
 
-	//convert to gamma space
-	diffuse.rgb = linear_to_srgb(diffuse.rgb);
-	
 	vec3 col;
 	float bloom = 0.0;
 	{
+        vec3 camPos = (camPosLocal / 1000.0f) + vec3(0, 0, 6360.0f);
+
 		vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy);
 		
 		vec2 scol_ambocc = texture2DRect(lightMap, vary_fragcoord.xy).rg;
@@ -132,17 +122,37 @@ void main()
 
 		float ambocc = scol_ambocc.g;
 
-		col *= diffuse.rgb;
-	
+        vec4 l1tap = vec4(1.0/sqrt(4*3.14159265), sqrt(3)/sqrt(4*3.14159265), sqrt(3)/sqrt(4*3.14159265), sqrt(3)/sqrt(4*3.14159265));
+        vec4 l1r = texture2D(sh_input_r, vec2(0,0));
+        vec4 l1g = texture2D(sh_input_g, vec2(0,0));
+        vec4 l1b = texture2D(sh_input_b, vec2(0,0));
+
+        vec3 indirect = vec3(dot(l1r, l1tap * vec4(1, norm.xyz)),
+                             dot(l1g, l1tap * vec4(1, norm.xyz)),
+                             dot(l1b, l1tap * vec4(1, norm.xyz)));
+
+        indirect = clamp(indirect, vec3(0), vec3(1.0));
+
+        vec3 transmittance;
+        vec3 sky_irradiance;
+        vec3 sun_irradiance = GetSunAndSkyIrradiance(camPos, norm.xyz, sun_dir, sky_irradiance);
+        vec3 inscatter = GetSkyLuminanceToPoint(camPos, (pos / 1000.f) + vec3(0, 0, 6360.0f), scol, sun_dir, transmittance);
+
+        vec3 radiance   = scol * (sun_irradiance + sky_irradiance) + inscatter;
+        vec3 atmo_color = ColorFromRadiance(radiance);
+
+        col = atmo_color + indirect;
+        col *= transmittance;
+        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 = sunlit*(texture2D(lightFunc, vec2(sa, spec.a)).r);
+			vec3 dumbshiny = scol * texture2D(lightFunc, vec2(sa, spec.a)).r * atmo_color;
 			
 			// add the two types of shiny together
 			vec3 spec_contrib = dumbshiny * spec.rgb;
@@ -155,17 +165,24 @@ void main()
 		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);
+            vec3 sun_direction  = (inv_modelview * vec4(sun_dir, 1.0)).xyz;
+            vec3 radiance_sun  = GetSkyLuminance(camPos, env_vec, 0.0f, sun_direction, transmittance);
+            vec3 refcol = ColorFromRadiance(radiance_sun);
+			col = mix(col.rgb, refcol, envIntensity);
 		}
 						
+		/*if (norm.w < 0.5)
+		{
+			col = scaleSoftClipFrag(col);
+		}*/
+
 		#ifdef WATER_FOG
 			vec4 fogged = applyWaterFogView(pos,vec4(col, bloom));
 			col = fogged.rgb;
 			bloom = fogged.a;
 		#endif
 
-		col = srgb_to_linear(col);
+        col = pow(col, vec3(light_gamma));
 	}
 	
 	frag_color.rgb = col;
diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightV.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightV.glsl
index c840d72784..9d872b8df8 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightV.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightV.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file softenLightF.glsl
+ * @file class3/deferred/softenLightV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -22,21 +22,17 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
-
-uniform mat4 modelview_projection_matrix;
-
 ATTRIBUTE vec3 position;
 
-uniform vec2 screen_res;
-
 VARYING vec2 vary_fragcoord;
 
+uniform mat4 modelview_projection_matrix;
+uniform vec2 screen_res;
+
 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;
 }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
index a7da140b31..80e2a9dd55 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
@@ -133,18 +133,7 @@ vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 }
 
 
-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/class3/deferred/sunLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/sunLightF.glsl
index aa5e99a2f7..894534b105 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/sunLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/sunLightF.glsl
@@ -68,19 +68,8 @@ uniform float spot_shadow_bias;
 uniform float spot_shadow_offset;
 
 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);
+vec3 getNorm(vec2 pos_screen);
 
 float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
 {
@@ -124,13 +113,8 @@ float pcfSpotShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_scr
 void main() 
 {
 	vec2 pos_screen = vary_fragcoord.xy;
-	
-	//try doing an unproject here
-	
 	vec4 pos = getPosition(pos_screen);
-	
-	vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
+	vec3 norm = getNorm(pos_screen);
 		
 	/*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL
 	{
diff --git a/indra/newview/app_settings/shaders/class3/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class3/deferred/sunLightSSAOF.glsl
index 58f3f2f91e..0870a80a32 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/sunLightSSAOF.glsl
@@ -68,81 +68,11 @@ uniform float shadow_offset;
 uniform float spot_shadow_bias;
 uniform float spot_shadow_offset;
 
-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;
-}
-
-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];
-}
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
 
 //calculate decreases in ambient lighting when crowded out (SSAO)
-float calcAmbientOcclusion(vec4 pos, vec3 norm)
-{
-	float ret = 1.0;
-
-	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;
-	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);
-}
+float calcAmbientOcclusion(vec4 pos, vec3 norm, pos_screen);
 
 float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
 {
@@ -184,14 +114,9 @@ float pcfSpotShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_scr
 
 void main() 
 {
-	vec2 pos_screen = vary_fragcoord.xy;
-	
-	//try doing an unproject here
-	
-	vec4 pos = getPosition(pos_screen);
-	
-	vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
+	vec2 pos_screen = vary_fragcoord.xy;	
+	vec4 pos        = getPosition(pos_screen);
+	vec3 norm       = getNorm(pos_screen);
 		
 	/*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL
 	{
@@ -291,7 +216,7 @@ void main()
 	}
 	
 	frag_color[0] = shadow;
-	frag_color[1] = calcAmbientOcclusion(pos, norm);
+	frag_color[1] = calcAmbientOcclusion(pos, norm, pos_screen);
 	
 	spos = vec4(shadow_pos+norm*spot_shadow_offset, 1.0);
 	
diff --git a/indra/newview/app_settings/shaders/class3/windlight/transportF.glsl b/indra/newview/app_settings/shaders/class3/windlight/transportF.glsl
index 8195801be6..9c050256dc 100644
--- a/indra/newview/app_settings/shaders/class3/windlight/transportF.glsl
+++ b/indra/newview/app_settings/shaders/class3/windlight/transportF.glsl
@@ -41,16 +41,18 @@ vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
 	return (light + additive) * atten * 2.0;
 }
 
-vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten) {
+vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
+{
     if (no_atmo == 1)
     {
 		return light;
 	}
 	float brightness = dot(light.rgb, vec3(0.33333));
-	return mix(atmosTransportFrag(light.rgb, additive,a tten), light.rgb + additive.rgb, brightness * brightness);
+	return mix(atmosTransportFrag(light.rgb, additive,atten), light.rgb + additive.rgb, brightness * brightness);
 }
 
-vec3 fullbrightShinyAtmosTransportFrag(vec3 light, vec3 atten, vec3 additive) {
+vec3 fullbrightShinyAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
+{
     if (no_atmo == 1)
     {
 		return light;
diff --git a/indra/newview/lltoolgun.cpp b/indra/newview/lltoolgun.cpp
index ee757f2566..9539081f30 100644
--- a/indra/newview/lltoolgun.cpp
+++ b/indra/newview/lltoolgun.cpp
@@ -116,7 +116,7 @@ BOOL LLToolGun::handleHover(S32 x, S32 y, MASK mask)
 			{
                 LLVector3 moonpos = LLViewerCamera::getInstance()->getAtAxis();
 				gSky.setMoonDirectionCFR(moonpos);
-				gSavedSettings.setVector3("SkySunDefaultPosition", LLViewerCamera::getInstance()->getAtAxis());
+				gSavedSettings.setVector3("SkyMoonDefaultPosition", LLViewerCamera::getInstance()->getAtAxis());
 			}
 
 			gViewerWindow->moveCursorToCenter();
diff --git a/indra/newview/llviewershadermgr.cpp b/indra/newview/llviewershadermgr.cpp
index 6418c9900e..6498ed652a 100644
--- a/indra/newview/llviewershadermgr.cpp
+++ b/indra/newview/llviewershadermgr.cpp
@@ -483,6 +483,8 @@ void LLViewerShaderMgr::setShaders()
         S32 shadow_detail            = gSavedSettings.getS32("RenderShadowDetail");
         bool useRenderDeferred       = canRenderDeferred && gSavedSettings.getBOOL("RenderDeferred") && gSavedSettings.getBOOL("RenderAvatarVP");
         bool doingWindLight          = hasWindLightShaders && gSavedSettings.getBOOL("WindLightUseAtmosShaders");
+        bool useAdvancedAtmospherics = doingWindLight && gSavedSettings.getBOOL("RenderUseAdvancedAtmospherics");
+        (void)useAdvancedAtmospherics;
 
 		//using shaders, disable fixed function
 		LLGLSLShader::sNoFixedFunction = true;
@@ -989,6 +991,8 @@ BOOL LLViewerShaderMgr::loadBasicShaders()
     index_channels.push_back(-1);	 shaders.push_back( make_pair( "environment/encodeNormF.glsl",				    mVertexShaderLevel[SHADER_ENVIRONMENT] ) );
     index_channels.push_back(-1);	 shaders.push_back( make_pair( "environment/decodeNormF.glsl",				    mVertexShaderLevel[SHADER_ENVIRONMENT] ) );
     index_channels.push_back(-1);	 shaders.push_back( make_pair( "environment/srgbF.glsl",				    mVertexShaderLevel[SHADER_ENVIRONMENT] ) );
+    index_channels.push_back(-1);	 shaders.push_back( make_pair( "deferred/deferredUtil.glsl",				    mVertexShaderLevel[SHADER_DEFERRED] ) );
+    index_channels.push_back(-1);	 shaders.push_back( make_pair( "deferred/indirect.glsl",				    mVertexShaderLevel[SHADER_DEFERRED] ) );
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "lighting/lightNonIndexedF.glsl",					mVertexShaderLevel[SHADER_LIGHTING] ) );
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "lighting/lightAlphaMaskNonIndexedF.glsl",					mVertexShaderLevel[SHADER_LIGHTING] ) );
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "lighting/lightFullbrightNonIndexedF.glsl",			mVertexShaderLevel[SHADER_LIGHTING] ) );
@@ -1042,7 +1046,10 @@ BOOL LLViewerShaderMgr::loadShadersEnvironment()
 		gTerrainProgram.mName = "Terrain Shader";
 		gTerrainProgram.mFeatures.calculatesLighting = true;
 		gTerrainProgram.mFeatures.calculatesAtmospherics = true;
-		gTerrainProgram.mFeatures.hasAtmospherics = true;
+        gTerrainProgram.mFeatures.hasAtmospherics = true;
+        gTerrainProgram.mFeatures.hasTransport = true;
+        gTerrainProgram.mFeatures.hasGamma = true;
+        gTerrainProgram.mFeatures.hasSrgb = true;
 		gTerrainProgram.mFeatures.mIndexedTextureChannels = 0;
 		gTerrainProgram.mFeatures.disableTextureIndex = true;
 		gTerrainProgram.mFeatures.hasGamma = true;
@@ -1201,6 +1208,8 @@ BOOL LLViewerShaderMgr::loadShadersEffects()
 
 BOOL LLViewerShaderMgr::loadShadersDeferred()
 {
+    bool use_sun_shadow = mVertexShaderLevel[SHADER_DEFERRED] > 1;
+
 	if (mVertexShaderLevel[SHADER_DEFERRED] == 0)
 	{
 		gDeferredTreeProgram.unload();
@@ -1330,7 +1339,6 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		success = gDeferredNonIndexedDiffuseProgram.createShader(NULL, NULL);
         llassert(success);
 	}
-		
 
 	if (success)
 	{
@@ -1373,6 +1381,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
         gDeferredSkinnedAlphaProgram.mFeatures.hasAtmospherics = true;
         gDeferredSkinnedAlphaProgram.mFeatures.hasTransport = true;
         gDeferredSkinnedAlphaProgram.mFeatures.hasGamma = true;
+        gDeferredSkinnedAlphaProgram.mFeatures.hasShadows = true;
+        gDeferredSkinnedAlphaProgram.mFeatures.hasIndirect = true;
 
 		gDeferredSkinnedAlphaProgram.mShaderFiles.clear();
 		gDeferredSkinnedAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1381,7 +1391,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredSkinnedAlphaProgram.addPermutation("USE_DIFFUSE_TEX", "1");
 		gDeferredSkinnedAlphaProgram.addPermutation("HAS_SKIN", "1");
 		gDeferredSkinnedAlphaProgram.addPermutation("USE_VERTEX_COLOR", "1");
-		gDeferredSkinnedAlphaProgram.addPermutation("HAS_SHADOW", mVertexShaderLevel[SHADER_DEFERRED] > 1 ? "1" : "0");
+		gDeferredSkinnedAlphaProgram.addPermutation("HAS_SHADOW", use_sun_shadow ? "1" : "0");
 		success = gDeferredSkinnedAlphaProgram.createShader(NULL, NULL);
 		llassert(success);
 
@@ -1435,17 +1445,19 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 			gDeferredMaterialProgram[i].addPermutation("HAS_NORMAL_MAP", i & 0x8? "1" : "0");
 			gDeferredMaterialProgram[i].addPermutation("HAS_SPECULAR_MAP", i & 0x4 ? "1" : "0");
 			gDeferredMaterialProgram[i].addPermutation("DIFFUSE_ALPHA_MODE", llformat("%d", alpha_mode));
-			gDeferredMaterialProgram[i].addPermutation("HAS_SUN_SHADOW", mVertexShaderLevel[SHADER_DEFERRED] > 1 ? "1" : "0");
+			gDeferredMaterialProgram[i].addPermutation("HAS_SUN_SHADOW", use_sun_shadow ? "1" : "0");
 			bool has_skin = i & 0x10;
 			gDeferredMaterialProgram[i].addPermutation("HAS_SKIN",has_skin ? "1" : "0");
 
 			gDeferredMaterialProgram[i].mFeatures.hasSrgb = true;
-            gDeferredMaterialProgram[i].mFeatures.hasGamma = true;
             gDeferredMaterialProgram[i].mFeatures.hasTransport = true;
             gDeferredMaterialProgram[i].mFeatures.decodesNormal = true;
             gDeferredMaterialProgram[i].mFeatures.encodesNormal = true;
             gDeferredMaterialProgram[i].mFeatures.calculatesAtmospherics = true;
             gDeferredMaterialProgram[i].mFeatures.hasAtmospherics = true;
+            gDeferredMaterialProgram[i].mFeatures.hasGamma = true;
+            gDeferredMaterialProgram[i].mFeatures.hasShadows = true;
+            gDeferredMaterialProgram[i].mFeatures.hasIndirect = true;
 
 			if (has_skin)
 			{
@@ -1478,12 +1490,14 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 
 			gDeferredMaterialWaterProgram[i].mFeatures.hasWaterFog = true;
 			gDeferredMaterialWaterProgram[i].mFeatures.hasSrgb = true;
-            gDeferredMaterialWaterProgram[i].mFeatures.hasGamma = true;
             gDeferredMaterialWaterProgram[i].mFeatures.hasTransport = true;
             gDeferredMaterialWaterProgram[i].mFeatures.decodesNormal = true;
             gDeferredMaterialWaterProgram[i].mFeatures.encodesNormal = true;
             gDeferredMaterialWaterProgram[i].mFeatures.calculatesAtmospherics = true;
             gDeferredMaterialWaterProgram[i].mFeatures.hasAtmospherics = true;
+            gDeferredMaterialWaterProgram[i].mFeatures.hasGamma = true;
+            gDeferredMaterialWaterProgram[i].mFeatures.hasShadows = true;
+            gDeferredMaterialWaterProgram[i].mFeatures.hasIndirect = true;
 
 			if (has_skin)
 			{
@@ -1555,6 +1569,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{		
 		gDeferredLightProgram.mName = "Deferred Light Shader";
         gDeferredLightProgram.mFeatures.decodesNormal = true;
+        gDeferredLightProgram.mFeatures.isDeferred = true;
+        gDeferredLightProgram.mFeatures.hasShadows = true;
+
 		gDeferredLightProgram.mShaderFiles.clear();
 		gDeferredLightProgram.mShaderFiles.push_back(make_pair("deferred/pointLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredLightProgram.mShaderFiles.push_back(make_pair("deferred/pointLightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1570,6 +1587,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 			gDeferredMultiLightProgram[i].mName = llformat("Deferred MultiLight Shader %d", i);
             gDeferredMultiLightProgram[i].mFeatures.decodesNormal = true;
+            gDeferredMultiLightProgram[i].mFeatures.isDeferred = true;
+            gDeferredMultiLightProgram[i].mFeatures.hasShadows = true;
+
 			gDeferredMultiLightProgram[i].mShaderFiles.clear();
 			gDeferredMultiLightProgram[i].mShaderFiles.push_back(make_pair("deferred/multiPointLightV.glsl", GL_VERTEX_SHADER_ARB));
 			gDeferredMultiLightProgram[i].mShaderFiles.push_back(make_pair("deferred/multiPointLightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1586,6 +1606,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredSpotLightProgram.mShaderFiles.clear();
 		gDeferredSpotLightProgram.mFeatures.hasSrgb = true;
         gDeferredSpotLightProgram.mFeatures.decodesNormal = true;
+        gDeferredSpotLightProgram.mFeatures.isDeferred = true;
+        gDeferredSpotLightProgram.mFeatures.hasShadows = true;
+
 		gDeferredSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/pointLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/spotLightF.glsl", GL_FRAGMENT_SHADER_ARB));
 		gDeferredSpotLightProgram.mShaderLevel = mVertexShaderLevel[SHADER_DEFERRED];
@@ -1599,6 +1622,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredMultiSpotLightProgram.mName = "Deferred MultiSpotLight Shader";
 		gDeferredMultiSpotLightProgram.mFeatures.hasSrgb = true;
         gDeferredMultiSpotLightProgram.mFeatures.decodesNormal = true;
+        gDeferredMultiSpotLightProgram.mFeatures.isDeferred = true;
+        gDeferredMultiSpotLightProgram.mFeatures.hasShadows = true;
+
 		gDeferredMultiSpotLightProgram.mShaderFiles.clear();
 		gDeferredMultiSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/multiPointLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredMultiSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/multiSpotLightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1628,6 +1654,10 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 
 		gDeferredSunProgram.mName = "Deferred Sun Shader";
         gDeferredSunProgram.mFeatures.decodesNormal = true;
+        gDeferredSunProgram.mFeatures.isDeferred    = true;
+        gDeferredSunProgram.mFeatures.hasShadows    = true;
+        gDeferredSunProgram.mFeatures.hasIndirect   = true;
+
 		gDeferredSunProgram.mShaderFiles.clear();
 		gDeferredSunProgram.mShaderFiles.push_back(make_pair(vertex, GL_VERTEX_SHADER_ARB));
 		gDeferredSunProgram.mShaderFiles.push_back(make_pair(fragment, GL_FRAGMENT_SHADER_ARB));
@@ -1641,6 +1671,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gDeferredBlurLightProgram.mName = "Deferred Blur Light Shader";
         gDeferredBlurLightProgram.mFeatures.decodesNormal = true;
+        gDeferredBlurLightProgram.mFeatures.isDeferred = true;
+
 		gDeferredBlurLightProgram.mShaderFiles.clear();
 		gDeferredBlurLightProgram.mShaderFiles.push_back(make_pair("deferred/blurLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredBlurLightProgram.mShaderFiles.push_back(make_pair("deferred/blurLightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1659,11 +1691,15 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaProgram.mFeatures.isAlphaLighting = true;
 		gDeferredAlphaProgram.mFeatures.disableTextureIndex = true; //hack to disable auto-setup of texture channels
         gDeferredAlphaProgram.mFeatures.hasSrgb = true;
-        gDeferredAlphaProgram.mFeatures.hasGamma = true;
         gDeferredAlphaProgram.mFeatures.decodesNormal = true;
         gDeferredAlphaProgram.mFeatures.encodesNormal = true;
         gDeferredAlphaProgram.mFeatures.calculatesAtmospherics = true;
         gDeferredAlphaProgram.mFeatures.hasAtmospherics = true;
+        gDeferredAlphaProgram.mFeatures.hasGamma = true;
+        gDeferredAlphaProgram.mFeatures.hasTransport = true;
+        gDeferredAlphaProgram.mFeatures.isDeferred = true;
+        gDeferredAlphaProgram.mFeatures.hasShadows = true;
+        gDeferredAlphaProgram.mFeatures.hasIndirect = true;
 
 		if (mVertexShaderLevel[SHADER_DEFERRED] < 1)
 		{
@@ -1678,7 +1714,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaF.glsl", GL_FRAGMENT_SHADER_ARB));
 		gDeferredAlphaProgram.addPermutation("USE_INDEXED_TEX", "1");
-		gDeferredAlphaProgram.addPermutation("HAS_SHADOW", mVertexShaderLevel[SHADER_DEFERRED] > 1 ? "1" : "0");
+		gDeferredAlphaProgram.addPermutation("HAS_SHADOW", use_sun_shadow ? "1" : "0");
 		gDeferredAlphaProgram.addPermutation("USE_VERTEX_COLOR", "1");
 		gDeferredAlphaProgram.mShaderLevel = mVertexShaderLevel[SHADER_DEFERRED];
 
@@ -1700,6 +1736,10 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaImpostorProgram.mFeatures.hasSrgb = true;
         gDeferredAlphaImpostorProgram.mFeatures.decodesNormal = true;
         gDeferredAlphaImpostorProgram.mFeatures.encodesNormal = true;
+        gDeferredAlphaImpostorProgram.mFeatures.isDeferred = true;
+        gDeferredAlphaImpostorProgram.mFeatures.hasShadows = true;
+        gDeferredAlphaImpostorProgram.mFeatures.hasIndirect = true;
+
 		gDeferredAlphaImpostorProgram.mFeatures.disableTextureIndex = true; //hack to disable auto-setup of texture channels
 		if (mVertexShaderLevel[SHADER_DEFERRED] < 1)
 		{
@@ -1714,7 +1754,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaImpostorProgram.mShaderFiles.push_back(make_pair("deferred/alphaV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAlphaImpostorProgram.mShaderFiles.push_back(make_pair("deferred/alphaF.glsl", GL_FRAGMENT_SHADER_ARB));
 		gDeferredAlphaImpostorProgram.addPermutation("USE_INDEXED_TEX", "1");
-		gDeferredAlphaImpostorProgram.addPermutation("HAS_SHADOW", mVertexShaderLevel[SHADER_DEFERRED] > 1 ? "1" : "0");
+		gDeferredAlphaImpostorProgram.addPermutation("HAS_SHADOW", use_sun_shadow ? "1" : "0");
 		gDeferredAlphaImpostorProgram.addPermutation("USE_VERTEX_COLOR", "1");
 		gDeferredAlphaImpostorProgram.addPermutation("FOR_IMPOSTOR", "1");
 
@@ -1737,11 +1777,14 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaWaterProgram.mFeatures.disableTextureIndex = true; //hack to disable auto-setup of texture channels
 		gDeferredAlphaWaterProgram.mFeatures.hasWaterFog = true;
 		gDeferredAlphaWaterProgram.mFeatures.hasSrgb = true;
-        gDeferredAlphaWaterProgram.mFeatures.hasGamma = true;
         gDeferredAlphaWaterProgram.mFeatures.decodesNormal = true;
         gDeferredAlphaWaterProgram.mFeatures.encodesNormal = true;
         gDeferredAlphaWaterProgram.mFeatures.calculatesAtmospherics = true;
         gDeferredAlphaWaterProgram.mFeatures.hasAtmospherics = true;
+        gDeferredAlphaWaterProgram.mFeatures.hasGamma = true;
+        gDeferredAlphaWaterProgram.mFeatures.isDeferred = true;
+        gDeferredAlphaWaterProgram.mFeatures.hasShadows = true;
+        gDeferredAlphaWaterProgram.mFeatures.hasIndirect = true;
 
 		if (mVertexShaderLevel[SHADER_DEFERRED] < 1)
 		{
@@ -1758,7 +1801,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaWaterProgram.addPermutation("USE_INDEXED_TEX", "1");
 		gDeferredAlphaWaterProgram.addPermutation("WATER_FOG", "1");
 		gDeferredAlphaWaterProgram.addPermutation("USE_VERTEX_COLOR", "1");
-		gDeferredAlphaWaterProgram.addPermutation("HAS_SHADOW", mVertexShaderLevel[SHADER_DEFERRED] > 1 ? "1" : "0");
+		gDeferredAlphaWaterProgram.addPermutation("HAS_SHADOW", use_sun_shadow ? "1" : "0");
 		gDeferredAlphaWaterProgram.mShaderLevel = mVertexShaderLevel[SHADER_DEFERRED];
 
 		success = gDeferredAlphaWaterProgram.createShader(NULL, NULL);
@@ -1778,7 +1821,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAvatarEyesProgram.mFeatures.disableTextureIndex = true;
         gDeferredAvatarEyesProgram.mFeatures.hasSrgb = true;
         gDeferredAvatarEyesProgram.mFeatures.encodesNormal = true;
-        gDeferredAvatarEyesProgram.mFeatures.hasGamma = true;
+        gDeferredAvatarEyesProgram.mFeatures.isDeferred = true;
+        gDeferredAvatarEyesProgram.mFeatures.hasShadows = true;
+
 		gDeferredAvatarEyesProgram.mShaderFiles.clear();
 		gDeferredAvatarEyesProgram.mShaderFiles.push_back(make_pair("deferred/avatarEyesV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAvatarEyesProgram.mShaderFiles.push_back(make_pair("deferred/diffuseF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1794,7 +1839,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightProgram.mFeatures.hasTransport = true;
 		gDeferredFullbrightProgram.mFeatures.hasSrgb = true;
-        gDeferredFullbrightProgram.mFeatures.hasGamma = true;
+        gDeferredFullbrightProgram.mFeatures.isDeferred = true;
+
 		gDeferredFullbrightProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightProgram.mShaderFiles.clear();
 		gDeferredFullbrightProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1811,7 +1857,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.hasTransport = true;
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.hasSrgb = true;
-        gDeferredFullbrightAlphaMaskProgram.mFeatures.hasGamma = true;
+        gDeferredFullbrightAlphaMaskProgram.mFeatures.isDeferred = true;
+
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightAlphaMaskProgram.mShaderFiles.clear();
 		gDeferredFullbrightAlphaMaskProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1830,7 +1877,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightWaterProgram.mFeatures.hasTransport = true;
 		gDeferredFullbrightWaterProgram.mFeatures.hasWaterFog = true;
 		gDeferredFullbrightWaterProgram.mFeatures.hasSrgb = true;
-        gDeferredFullbrightWaterProgram.mFeatures.hasGamma = true;
+        gDeferredFullbrightWaterProgram.mFeatures.isDeferred = true;
 		gDeferredFullbrightWaterProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightWaterProgram.mShaderFiles.clear();
 		gDeferredFullbrightWaterProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1850,7 +1897,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasTransport = true;
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasWaterFog = true;
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasSrgb = true;
-        gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasGamma = true;
+        gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.isDeferred = true;
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightAlphaMaskWaterProgram.mShaderFiles.clear();
 		gDeferredFullbrightAlphaMaskWaterProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1869,6 +1916,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightShinyProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredFullbrightShinyProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightShinyProgram.mFeatures.hasTransport = true;
+        gDeferredFullbrightShinyProgram.mFeatures.isDeferred = true;
 		gDeferredFullbrightShinyProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels-1;
 		gDeferredFullbrightShinyProgram.mShaderFiles.clear();
 		gDeferredFullbrightShinyProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightShinyV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1887,6 +1935,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredSkinnedFullbrightProgram.mFeatures.hasObjectSkinning = true;
 		gDeferredSkinnedFullbrightProgram.mFeatures.disableTextureIndex = true;
 		gDeferredSkinnedFullbrightProgram.mFeatures.hasSrgb = true;
+        gDeferredSkinnedFullbrightProgram.mFeatures.isDeferred = true;
 		gDeferredSkinnedFullbrightProgram.mShaderFiles.clear();
 		gDeferredSkinnedFullbrightProgram.mShaderFiles.push_back(make_pair("objects/fullbrightSkinnedV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSkinnedFullbrightProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1903,6 +1952,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredSkinnedFullbrightShinyProgram.mFeatures.hasTransport = true;
 		gDeferredSkinnedFullbrightShinyProgram.mFeatures.hasObjectSkinning = true;
 		gDeferredSkinnedFullbrightShinyProgram.mFeatures.disableTextureIndex = true;
+        gDeferredSkinnedFullbrightShinyProgram.mFeatures.isDeferred = true;
 		gDeferredSkinnedFullbrightShinyProgram.mShaderFiles.clear();
 		gDeferredSkinnedFullbrightShinyProgram.mShaderFiles.push_back(make_pair("objects/fullbrightShinySkinnedV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSkinnedFullbrightShinyProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightShinyF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1917,6 +1967,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredEmissiveProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredEmissiveProgram.mFeatures.hasGamma = true;
 		gDeferredEmissiveProgram.mFeatures.hasTransport = true;
+        gDeferredEmissiveProgram.mFeatures.isDeferred = true;
 		gDeferredEmissiveProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredEmissiveProgram.mShaderFiles.clear();
 		gDeferredEmissiveProgram.mShaderFiles.push_back(make_pair("deferred/emissiveV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1934,6 +1985,10 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredWaterProgram.mFeatures.hasGamma = true;
 		gDeferredWaterProgram.mFeatures.hasTransport = true;
         gDeferredWaterProgram.mFeatures.encodesNormal = true;
+        gDeferredWaterProgram.mFeatures.isDeferred = true;
+        gDeferredWaterProgram.mFeatures.hasShadows = true;
+        gDeferredWaterProgram.mFeatures.hasIndirect = true;
+
 		gDeferredWaterProgram.mShaderFiles.clear();
 		gDeferredWaterProgram.mShaderFiles.push_back(make_pair("deferred/waterV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredWaterProgram.mShaderFiles.push_back(make_pair("deferred/waterF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1953,6 +2008,10 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredUnderWaterProgram.mFeatures.hasTransport = true;
 		gDeferredUnderWaterProgram.mFeatures.hasSrgb = true;
         gDeferredUnderWaterProgram.mFeatures.encodesNormal = true;
+        gDeferredUnderWaterProgram.mFeatures.isDeferred = true;
+        gDeferredUnderWaterProgram.mFeatures.hasShadows = true;
+        gDeferredUnderWaterProgram.mFeatures.hasIndirect = true;
+
 		gDeferredUnderWaterProgram.mShaderFiles.clear();
 		gDeferredUnderWaterProgram.mShaderFiles.push_back(make_pair("deferred/waterV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredUnderWaterProgram.mShaderFiles.push_back(make_pair("deferred/underWaterF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1969,17 +2028,29 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
         gDeferredSoftenProgram.mFeatures.decodesNormal = true;
         gDeferredSoftenProgram.mFeatures.calculatesAtmospherics = true;
         gDeferredSoftenProgram.mFeatures.hasAtmospherics = true;
+        gDeferredSoftenProgram.mFeatures.hasTransport = true;
         gDeferredSoftenProgram.mFeatures.hasGamma = true;
+        gDeferredSoftenProgram.mFeatures.isDeferred = true;
+        gDeferredSoftenProgram.mFeatures.hasShadows = true;
+        gDeferredSoftenProgram.mFeatures.hasIndirect = true;
 
 		gDeferredSoftenProgram.mShaderFiles.push_back(make_pair("deferred/softenLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSoftenProgram.mShaderFiles.push_back(make_pair("deferred/softenLightF.glsl", GL_FRAGMENT_SHADER_ARB));
 
 		gDeferredSoftenProgram.mShaderLevel = mVertexShaderLevel[SHADER_DEFERRED];
 
-		if (gSavedSettings.getBOOL("RenderDeferredSSAO"))
+        if (gSavedSettings.getBOOL("RenderDeferredSSAO"))
 		{ //if using SSAO, take screen space light map into account as if shadows are enabled
 			gDeferredSoftenProgram.mShaderLevel = llmax(gDeferredSoftenProgram.mShaderLevel, 2);
 		}
+
+        // insure we use class3/deferred version of softenLight for advanced atmo..
+        gDeferredSoftenProgram.mShaderLevel = gSavedSettings.getBOOL("RenderUseAdvancedAtmospherics") ? 3 : gDeferredSoftenProgram.mShaderLevel;
+        
+        if (gAtmosphere && gDeferredSoftenProgram.mShaderLevel > 2)
+        {
+            gDeferredSoftenProgram.mExtraLinkObject = gAtmosphere->getAtmosphericShaderForLink();
+        }
 				
 		success = gDeferredSoftenProgram.createShader(NULL, NULL);
         llassert(success);
@@ -2000,7 +2071,21 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
         gDeferredSoftenWaterProgram.mFeatures.decodesNormal = true;
         gDeferredSoftenWaterProgram.mFeatures.calculatesAtmospherics = true;
         gDeferredSoftenWaterProgram.mFeatures.hasAtmospherics = true;
+        gDeferredSoftenWaterProgram.mFeatures.hasTransport = true;
         gDeferredSoftenWaterProgram.mFeatures.hasGamma = true;
+        gDeferredSoftenWaterProgram.mFeatures.isDeferred = true;
+        gDeferredSoftenWaterProgram.mFeatures.hasShadows = true;
+        gDeferredSoftenWaterProgram.mFeatures.hasIndirect = true;
+
+        if (gAtmosphere && gDeferredSoftenWaterProgram.mShaderLevel > 2)
+        {
+            gDeferredSoftenWaterProgram.mExtraLinkObject = gAtmosphere->getAtmosphericShaderForLink();
+        }
+
+        if (gAtmosphere && gDeferredSoftenWaterProgram.mShaderLevel > 2)
+        {
+            gDeferredSoftenWaterProgram.mExtraLinkObject = gAtmosphere->getAtmosphericShaderForLink();
+        }
 
 		if (gSavedSettings.getBOOL("RenderDeferredSSAO"))
 		{ //if using SSAO, take screen space light map into account as if shadows are enabled
@@ -2014,6 +2099,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredShadowProgram.mName = "Deferred Shadow Shader";
+        gDeferredShadowProgram.mFeatures.isDeferred = true;
 		gDeferredShadowProgram.mShaderFiles.clear();
 		gDeferredShadowProgram.mShaderFiles.push_back(make_pair("deferred/shadowV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredShadowProgram.mShaderFiles.push_back(make_pair("deferred/shadowF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2026,6 +2112,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredShadowCubeProgram.mName = "Deferred Shadow Cube Shader";
+        gDeferredShadowCubeProgram.mFeatures.isDeferred = true;
 		gDeferredShadowCubeProgram.mShaderFiles.clear();
 		gDeferredShadowCubeProgram.mShaderFiles.push_back(make_pair("deferred/shadowCubeV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredShadowCubeProgram.mShaderFiles.push_back(make_pair("deferred/shadowF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2039,6 +2126,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gDeferredShadowAlphaMaskProgram.mName = "Deferred Shadow Alpha Mask Shader";
 		gDeferredShadowAlphaMaskProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
+        gDeferredShadowAlphaMaskProgram.mFeatures.isDeferred = true;
 		gDeferredShadowAlphaMaskProgram.mShaderFiles.clear();
 		gDeferredShadowAlphaMaskProgram.mShaderFiles.push_back(make_pair("deferred/shadowAlphaMaskV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredShadowAlphaMaskProgram.mShaderFiles.push_back(make_pair("deferred/shadowAlphaMaskF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2052,6 +2140,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gDeferredAvatarShadowProgram.mName = "Deferred Avatar Shadow Shader";
 		gDeferredAvatarShadowProgram.mFeatures.hasSkinning = true;
+        gDeferredAvatarShadowProgram.mFeatures.isDeferred = true;
 		gDeferredAvatarShadowProgram.mShaderFiles.clear();
 		gDeferredAvatarShadowProgram.mShaderFiles.push_back(make_pair("deferred/avatarShadowV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAvatarShadowProgram.mShaderFiles.push_back(make_pair("deferred/avatarShadowF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2065,6 +2154,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gDeferredAttachmentShadowProgram.mName = "Deferred Attachment Shadow Shader";
 		gDeferredAttachmentShadowProgram.mFeatures.hasObjectSkinning = true;
+        gDeferredAttachmentShadowProgram.mFeatures.isDeferred = true;
 		gDeferredAttachmentShadowProgram.mShaderFiles.clear();
 		gDeferredAttachmentShadowProgram.mShaderFiles.push_back(make_pair("deferred/attachmentShadowV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAttachmentShadowProgram.mShaderFiles.push_back(make_pair("deferred/attachmentShadowF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2078,6 +2168,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gTerrainProgram.mName = "Deferred Terrain Shader";
         gDeferredTerrainProgram.mFeatures.encodesNormal = true;
+        gDeferredTerrainProgram.mFeatures.isDeferred = true;
 		gDeferredTerrainProgram.mShaderFiles.clear();
 		gDeferredTerrainProgram.mShaderFiles.push_back(make_pair("deferred/terrainV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredTerrainProgram.mShaderFiles.push_back(make_pair("deferred/terrainF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2091,6 +2182,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAvatarProgram.mName = "Avatar Shader";
 		gDeferredAvatarProgram.mFeatures.hasSkinning = true;
         gDeferredAvatarProgram.mFeatures.encodesNormal = true;
+        gDeferredAvatarProgram.mFeatures.isDeferred = true;
 		gDeferredAvatarProgram.mShaderFiles.clear();
 		gDeferredAvatarProgram.mShaderFiles.push_back(make_pair("deferred/avatarV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAvatarProgram.mShaderFiles.push_back(make_pair("deferred/avatarF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2114,6 +2206,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
         gDeferredAvatarAlphaProgram.mFeatures.hasAtmospherics = true;
         gDeferredAvatarAlphaProgram.mFeatures.hasTransport = true;
         gDeferredAvatarAlphaProgram.mFeatures.hasGamma = true;
+        gDeferredAvatarAlphaProgram.mFeatures.isDeferred = true;
+        gDeferredAvatarAlphaProgram.mFeatures.hasShadows = true;
+        gDeferredAvatarAlphaProgram.mFeatures.hasIndirect = true;
 
 		gDeferredAvatarAlphaProgram.mShaderFiles.clear();
 		gDeferredAvatarAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaV.glsl", GL_VERTEX_SHADER_ARB));
@@ -2134,6 +2229,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gDeferredPostGammaCorrectProgram.mName = "Deferred Gamma Correction Post Process";
 		gDeferredPostGammaCorrectProgram.mFeatures.hasSrgb = true;
+        gDeferredPostGammaCorrectProgram.mFeatures.isDeferred = true;
 		gDeferredPostGammaCorrectProgram.mShaderFiles.clear();
 		gDeferredPostGammaCorrectProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredNoTCV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredPostGammaCorrectProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredGammaCorrect.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2145,6 +2241,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gFXAAProgram.mName = "FXAA Shader";
+        gFXAAProgram.mFeatures.isDeferred = true;
 		gFXAAProgram.mShaderFiles.clear();
 		gFXAAProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredV.glsl", GL_VERTEX_SHADER_ARB));
 		gFXAAProgram.mShaderFiles.push_back(make_pair("deferred/fxaaF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2156,6 +2253,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredPostProgram.mName = "Deferred Post Shader";
+        gFXAAProgram.mFeatures.isDeferred = true;
 		gDeferredPostProgram.mShaderFiles.clear();
 		gDeferredPostProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredNoTCV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredPostProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2178,6 +2276,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredDoFCombineProgram.mName = "Deferred DoFCombine Shader";
+        gDeferredDoFCombineProgram.mFeatures.isDeferred = true;
 		gDeferredDoFCombineProgram.mShaderFiles.clear();
 		gDeferredDoFCombineProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredNoTCV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredDoFCombineProgram.mShaderFiles.push_back(make_pair("deferred/dofCombineF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2189,6 +2288,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredPostNoDoFProgram.mName = "Deferred Post Shader";
+        gDeferredPostNoDoFProgram.mFeatures.isDeferred = true;
 		gDeferredPostNoDoFProgram.mShaderFiles.clear();
 		gDeferredPostNoDoFProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredNoTCV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredPostNoDoFProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredNoDoFF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2205,6 +2305,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
         gDeferredWLSkyProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredWLSkyProgram.mFeatures.hasTransport = true;
         gDeferredWLSkyProgram.mFeatures.hasGamma = true;
+        gDeferredWLSkyProgram.mFeatures.hasSrgb = true;
+        gDeferredWLSkyProgram.mFeatures.isDeferred = true;
+
 		gDeferredWLSkyProgram.mShaderFiles.push_back(make_pair("deferred/skyV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredWLSkyProgram.mShaderFiles.push_back(make_pair("deferred/skyF.glsl", GL_FRAGMENT_SHADER_ARB));
         gDeferredWLSkyProgram.mShaderLevel = mVertexShaderLevel[SHADER_WINDLIGHT];
@@ -2220,6 +2323,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
         gDeferredWLCloudProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredWLCloudProgram.mFeatures.hasTransport = true;
         gDeferredWLCloudProgram.mFeatures.hasGamma = true;
+        gDeferredWLCloudProgram.mFeatures.hasSrgb = true;
+        gDeferredWLCloudProgram.mFeatures.isDeferred = true;
+
 		gDeferredWLCloudProgram.mShaderFiles.push_back(make_pair("deferred/cloudsV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredWLCloudProgram.mShaderFiles.push_back(make_pair("deferred/cloudsF.glsl", GL_FRAGMENT_SHADER_ARB));
 		gDeferredWLCloudProgram.mShaderLevel = mVertexShaderLevel[SHADER_WINDLIGHT];
@@ -2237,6 +2343,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredWLSunProgram.mFeatures.hasAtmospherics = true;
         gDeferredWLSunProgram.mFeatures.isFullbright = true;
 		gDeferredWLSunProgram.mFeatures.disableTextureIndex = true;
+        gDeferredWLSunProgram.mFeatures.isDeferred = true;
 		gDeferredWLSunProgram.mShaderFiles.clear();
 		gDeferredWLSunProgram.mShaderFiles.push_back(make_pair("deferred/sunDiscV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredWLSunProgram.mShaderFiles.push_back(make_pair("deferred/sunDiscF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2255,6 +2362,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredWLMoonProgram.mFeatures.hasAtmospherics = true;
         gDeferredWLMoonProgram.mFeatures.isFullbright = true;
 		gDeferredWLMoonProgram.mFeatures.disableTextureIndex = true;
+        gDeferredWLMoonProgram.mFeatures.isDeferred = true;
+
 		gDeferredWLMoonProgram.mShaderFiles.clear();
 		gDeferredWLMoonProgram.mShaderFiles.push_back(make_pair("deferred/moonV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredWLMoonProgram.mShaderFiles.push_back(make_pair("deferred/moonF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2267,6 +2376,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredStarProgram.mName = "Deferred Star Program";
+        gDeferredStarProgram.mFeatures.isDeferred = true;
 		gDeferredStarProgram.mShaderFiles.clear();
 		gDeferredStarProgram.mShaderFiles.push_back(make_pair("deferred/starsV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredStarProgram.mShaderFiles.push_back(make_pair("deferred/starsF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2279,6 +2389,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gNormalMapGenProgram.mName = "Normal Map Generation Program";
+        gNormalMapGenProgram.mFeatures.isDeferred = true;
 		gNormalMapGenProgram.mShaderFiles.clear();
 		gNormalMapGenProgram.mShaderFiles.push_back(make_pair("deferred/normgenV.glsl", GL_VERTEX_SHADER_ARB));
 		gNormalMapGenProgram.mShaderFiles.push_back(make_pair("deferred/normgenF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -3603,20 +3714,19 @@ BOOL LLViewerShaderMgr::loadShadersWindLight()
 		return TRUE;
 	}
 
-#if USE_ADVANCED_ATMOSPHERICS
-// disabled until we can determine why low-end machines crash during this init...
-    if (mVertexShaderLevel[SHADER_WINDLIGHT] > 1)
+    if (gSavedSettings.getBOOL("RenderUseAdvancedAtmospherics") && mVertexShaderLevel[SHADER_WINDLIGHT] > 2)
     {
         // Prepare precomputed atmospherics textures using libatmosphere
         LLAtmosphere::initClass();
     }
-#endif
 
 	if (success)
 	{
 		gWLSkyProgram.mName = "Windlight Sky Shader";
 		//gWLSkyProgram.mFeatures.hasGamma = true;
 		gWLSkyProgram.mShaderFiles.clear();
+        gWLSkyProgram.mFeatures.calculatesAtmospherics = true;
+		gWLSkyProgram.mFeatures.hasTransport = true;
         gWLSkyProgram.mFeatures.hasGamma = true;
 		gWLSkyProgram.mShaderFiles.push_back(make_pair("windlight/skyV.glsl", GL_VERTEX_SHADER_ARB));
 		gWLSkyProgram.mShaderFiles.push_back(make_pair("windlight/skyF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -3630,6 +3740,8 @@ BOOL LLViewerShaderMgr::loadShadersWindLight()
 		gWLCloudProgram.mName = "Windlight Cloud Program";
 		//gWLCloudProgram.mFeatures.hasGamma = true;
 		gWLCloudProgram.mShaderFiles.clear();
+        gWLCloudProgram.mFeatures.calculatesAtmospherics = true;
+		gWLCloudProgram.mFeatures.hasTransport = true;
         gWLCloudProgram.mFeatures.hasGamma = true;
 		gWLCloudProgram.mShaderFiles.push_back(make_pair("windlight/cloudsV.glsl", GL_VERTEX_SHADER_ARB));
 		gWLCloudProgram.mShaderFiles.push_back(make_pair("windlight/cloudsF.glsl", GL_FRAGMENT_SHADER_ARB));
diff --git a/indra/newview/llvowlsky.h b/indra/newview/llvowlsky.h
index ef3f8e0361..3217d2a7e2 100644
--- a/indra/newview/llvowlsky.h
+++ b/indra/newview/llvowlsky.h
@@ -88,9 +88,9 @@ private:
 	std::vector< LLPointer<LLVertexBuffer> >	mStripsVerts;
 	LLPointer<LLVertexBuffer>					mStarsVerts;
 
-	std::vector<LLVector3>	mStarVertices;				// Star verticies
-	std::vector<LLColor4>	mStarColors;				// Star colors
-	std::vector<F32>		mStarIntensities;			// Star intensities
+	std::vector<LLVector3>	mStarVertices;    // Star verticies
+	std::vector<LLColor4>	mStarColors;      // Star colors
+	std::vector<F32>		mStarIntensities; // Star intensities
 };
 
 #endif // LL_VOWLSKY_H
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index f91878587f..bac6267bbd 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -853,6 +853,9 @@ LLPipeline::eFBOStatus LLPipeline::doAllocateScreenBuffer(U32 resX, U32 resY)
 	return ret;
 }
 
+ // must be even to avoid a stripe in the horizontal shadow blur
+inline U32 BlurHappySize(U32 x, U32 scale) { return (((x*scale)+1)&~1); }
+
 bool LLPipeline::allocateScreenBuffer(U32 resX, U32 resY, U32 samples)
 {
 	refreshCachedSettings();
@@ -921,22 +924,34 @@ bool LLPipeline::allocateScreenBuffer(U32 resX, U32 resY, U32 samples)
 		}
 
 		F32 scale = RenderShadowResolutionScale;
+        U32 sun_shadow_map_width  = BlurHappySize(resX, scale);
+        U32 sun_shadow_map_height = BlurHappySize(resY, scale);
 
 		if (shadow_detail > 0)
 		{ //allocate 4 sun shadow maps
-			U32 sun_shadow_map_width = ((U32(resX*scale)+1)&~1); // must be even to avoid a stripe in the horizontal shadow blur
 			for (U32 i = 0; i < 4; i++)
 			{
-				if (!mShadow[i].allocate(sun_shadow_map_width,U32(resY*scale), 0, TRUE, FALSE, LLTexUnit::TT_TEXTURE)) return false;
-				if (!mShadowOcclusion[i].allocate(mShadow[i].getWidth()/occlusion_divisor, mShadow[i].getHeight()/occlusion_divisor, 0, TRUE, FALSE, LLTexUnit::TT_TEXTURE)) return false;
+		        //allocate VSM sun shadow map(s)
+				if ((shadow_detail > 3) && !mShadow[i].allocate(sun_shadow_map_width, sun_shadow_map_height, GL_RGBA16F_ARB, FALSE, FALSE, LLTexUnit::TT_TEXTURE))
+                {
+                    return false;
+                }
+                else if (!mShadow[i].allocate(sun_shadow_map_width, sun_shadow_map_height, 0, TRUE, FALSE, LLTexUnit::TT_TEXTURE))
+                {
+                    return false;
+                }
+
+				if (!mShadowOcclusion[i].allocate(sun_shadow_map_width/occlusion_divisor, sun_shadow_map_height/occlusion_divisor, 0, TRUE, FALSE, LLTexUnit::TT_TEXTURE))
+                {
+                    return false;
+                }
 			}
 		}
 		else
 		{
 			for (U32 i = 0; i < 4; i++)
 			{
-				mShadow[i].release();
-				mShadowOcclusion[i].release();
+                releaseShadowTarget(i);
 			}
 		}
 
@@ -952,19 +967,29 @@ bool LLPipeline::allocateScreenBuffer(U32 resX, U32 resY, U32 samples)
 
 		if (shadow_detail > 1)
 		{ //allocate two spot shadow maps
-			U32 spot_shadow_map_width = width;
+			U32 spot_shadow_map_width  = width;
+            U32 spot_shadow_map_height = height;
 			for (U32 i = 4; i < 6; i++)
 			{
-				if (!mShadow[i].allocate(spot_shadow_map_width, height, 0, TRUE, FALSE)) return false;
-				if (!mShadowOcclusion[i].allocate(mShadow[i].getWidth()/occlusion_divisor, mShadow[i].getHeight()/occlusion_divisor, 0, TRUE, FALSE)) return false;
+                if ((shadow_detail > 3) && !mShadow[i].allocate(spot_shadow_map_width, spot_shadow_map_height, GL_RGBA16F_ARB, FALSE, FALSE))
+                {
+                    return false;
+                }
+				else if (!mShadow[i].allocate(spot_shadow_map_width, spot_shadow_map_height, 0, TRUE, FALSE))
+                {
+                    return false;
+                }
+				if (!mShadowOcclusion[i].allocate(spot_shadow_map_width/occlusion_divisor, height/occlusion_divisor, 0, TRUE, FALSE))
+                {
+                    return false;
+                }
 			}
 		}
 		else
 		{
 			for (U32 i = 4; i < 6; i++)
 			{
-				mShadow[i].release();
-				mShadowOcclusion[i].release();
+                releaseShadowTarget(i);
 			}
 		}
 
@@ -978,11 +1003,7 @@ bool LLPipeline::allocateScreenBuffer(U32 resX, U32 resY, U32 samples)
 	{
 		mDeferredLight.release();
 				
-		for (U32 i = 0; i < 6; i++)
-		{
-			mShadow[i].release();
-			mShadowOcclusion[i].release();
-		}
+		releaseShadowTargets();
 		mFXAABuffer.release();
 		mScreen.release();
 		mDeferredScreen.release(); //make sure to release any render targets that share a depth buffer with mDeferredScreen first
@@ -1179,16 +1200,26 @@ void LLPipeline::releaseScreenBuffers()
 	mDeferredLight.release();
 	mOcclusionDepth.release();
 		
-	for (U32 i = 0; i < 6; i++)
-	{
-		mShadow[i].release();
-		mShadowOcclusion[i].release();
-	}
+	releaseShadowTargets();
 
 	mInscatter.release();
 }
 
 
+void LLPipeline::releaseShadowTarget(U32 index)
+{
+    mShadow[index].release();
+	mShadowOcclusion[index].release();
+}
+
+void LLPipeline::releaseShadowTargets()
+{
+    for (U32 i = 0; i < 6; i++)
+	{
+        releaseShadowTarget(i);
+	}
+}
+
 void LLPipeline::createGLBuffers()
 {
 	stop_glerror();
@@ -8285,20 +8316,24 @@ void LLPipeline::bindDeferredShader(LLGLSLShader& shader, U32 light_index, U32 n
 
 	for (U32 i = 0; i < 4; i++)
 	{
-		channel = shader.enableTexture(LLShaderMgr::DEFERRED_SHADOW0+i, LLTexUnit::TT_TEXTURE);
-		stop_glerror();
-		if (channel > -1)
-		{
-			stop_glerror();
-			gGL.getTexUnit(channel)->bind(&mShadow[i], TRUE);
-			gGL.getTexUnit(channel)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);
-			gGL.getTexUnit(channel)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
-			stop_glerror();
+        LLRenderTarget* shadow_target = getShadowTarget(i);
+        if (shadow_target)
+        {
+		    channel = shader.enableTexture(LLShaderMgr::DEFERRED_SHADOW0+i, LLTexUnit::TT_TEXTURE);
+		    stop_glerror();
+		    if (channel > -1)
+		    {
+			    stop_glerror();
+			    gGL.getTexUnit(channel)->bind(getShadowTarget(i), TRUE);
+			    gGL.getTexUnit(channel)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);
+			    gGL.getTexUnit(channel)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
+			    stop_glerror();
 			
-			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);
-			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
-			stop_glerror();
-		}
+			    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);
+			    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
+			    stop_glerror();
+		    }
+        }
 	}
 
 	for (U32 i = 4; i < 6; i++)
@@ -8308,18 +8343,22 @@ void LLPipeline::bindDeferredShader(LLGLSLShader& shader, U32 light_index, U32 n
 		if (channel > -1)
 		{
 			stop_glerror();
-			gGL.getTexUnit(channel)->bind(&mShadow[i], TRUE);
-			gGL.getTexUnit(channel)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);
-			gGL.getTexUnit(channel)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
-			stop_glerror();
+            LLRenderTarget* shadow_target = getShadowTarget(i);
+            if (shadow_target)
+            {
+			    gGL.getTexUnit(channel)->bind(shadow_target, TRUE);
+			    gGL.getTexUnit(channel)->setTextureFilteringOption(LLTexUnit::TFO_BILINEAR);
+			    gGL.getTexUnit(channel)->setTextureAddressMode(LLTexUnit::TAM_CLAMP);
+			    stop_glerror();
 			
-			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);
-			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
-			stop_glerror();
+			    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);
+			    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
+			    stop_glerror();
+            }
 		}
 	}
 
-    channel = shader.enableTexture(LLShaderMgr::INSCATTER_RT, LLTexUnit::TT_TEXTURE);
+    /*channel = shader.enableTexture(LLShaderMgr::INSCATTER_RT, LLTexUnit::TT_TEXTURE);
     stop_glerror();
     if (channel > -1)
     {
@@ -8332,7 +8371,7 @@ void LLPipeline::bindDeferredShader(LLGLSLShader& shader, U32 light_index, U32 n
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_ALWAYS);
         stop_glerror();
-    }
+    }*/
 
 	stop_glerror();
 
@@ -10600,6 +10639,10 @@ void LLPipeline::generateHighlight(LLCamera& camera)
 	}
 }
 
+LLRenderTarget* LLPipeline::getShadowTarget(U32 i)
+{
+    return &mShadow[i];
+}
 
 static LLTrace::BlockTimerStatHandle FTM_GEN_SUN_SHADOW("Gen Sun Shadow");
 
@@ -10819,9 +10862,13 @@ void LLPipeline::generateSunShadow(LLCamera& camera)
 
 		for (S32 j = 0; j < 4; j++)
 		{
-			mShadow[j].bindTarget();
-			mShadow[j].clear();
-			mShadow[j].flush();
+            LLRenderTarget* shadow_target = getShadowTarget(j);
+            if (shadow_target)
+            {
+			    shadow_target->bindTarget();
+			    shadow_target->clear();
+			    shadow_target->flush();
+            }
 		}
 	}
 	else
@@ -10887,12 +10934,16 @@ void LLPipeline::generateSunShadow(LLCamera& camera)
 					mShadowCamera[j+4] = shadow_cam;
 				}
 
-				mShadow[j].bindTarget();
-				{
-					LLGLDepthTest depth(GL_TRUE);
-					mShadow[j].clear();
-				}
-				mShadow[j].flush();
+                LLRenderTarget* shadow_target = getShadowTarget(j);
+                if (shadow_target)
+                {
+				    shadow_target->bindTarget();
+				    {
+					    LLGLDepthTest depth(GL_TRUE);
+					    shadow_target->clear();
+				    }
+				    shadow_target->flush();
+                }
 
 				mShadowError.mV[j] = 0.f;
 				mShadowFOV.mV[j] = 0.f;
@@ -11181,20 +11232,24 @@ void LLPipeline::generateSunShadow(LLCamera& camera)
 		
 			stop_glerror();
 
-			mShadow[j].bindTarget();
-			mShadow[j].getViewport(gGLViewport);
-			mShadow[j].clear();
-		
-			U32 target_width = mShadow[j].getWidth();
+            LLRenderTarget* shadow_target = getShadowTarget(j);
 
-			{
-				static LLCullResult result[4];
+            if (shadow_target)
+            {
+			    shadow_target->bindTarget();
+			    shadow_target->getViewport(gGLViewport);
+			    shadow_target->clear();			
 
-				renderShadow(view[j], proj[j], shadow_cam, result[j], TRUE, TRUE, target_width);
-			}
+			    U32 target_width = shadow_target->getWidth();
+
+			    {
+				    static LLCullResult result[4];
+				    renderShadow(view[j], proj[j], shadow_cam, result[j], TRUE, TRUE, target_width);
+			    }
+
+			    shadow_target->flush();
+            }
 
-			mShadow[j].flush();
- 
 			if (!gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_SHADOW_FRUSTA))
 			{
 				LLViewerCamera::updateFrustumPlanes(shadow_cam, FALSE, FALSE, TRUE);
@@ -11327,19 +11382,23 @@ void LLPipeline::generateSunShadow(LLCamera& camera)
 
 			stop_glerror();
 
-			mShadow[i+4].bindTarget();
-			mShadow[i+4].getViewport(gGLViewport);
-			mShadow[i+4].clear();
+            LLRenderTarget* shadow_target = getShadowTarget(i + 4);
 
-			U32 target_width = mShadow[i+4].getWidth();
-
-			static LLCullResult result[2];
+            if (shadow_target)
+            {
+			    shadow_target->bindTarget();
+			    shadow_target->getViewport(gGLViewport);
+			    shadow_target->clear();
+            
+                U32 target_width = shadow_target->getWidth();
 
-			LLViewerCamera::sCurCameraID = (LLViewerCamera::eCameraID)(LLViewerCamera::CAMERA_SHADOW0 + i + 4);
+			    static LLCullResult result[2];
+			    LLViewerCamera::sCurCameraID = (LLViewerCamera::eCameraID)(LLViewerCamera::CAMERA_SHADOW0 + i + 4);
 
-			renderShadow(view[i+4], proj[i+4], shadow_cam, result[i], FALSE, FALSE, target_width);
+			    renderShadow(view[i+4], proj[i+4], shadow_cam, result[i], FALSE, FALSE, target_width);
 
-			mShadow[i+4].flush();
+			    shadow_target->flush();
+            }
  		}
 	}
 	else
diff --git a/indra/newview/pipeline.h b/indra/newview/pipeline.h
index b292ac9358..3646aaaf45 100644
--- a/indra/newview/pipeline.h
+++ b/indra/newview/pipeline.h
@@ -209,6 +209,8 @@ public:
 	U32         addObject(LLViewerObject *obj);
 
 	void		enableShadows(const bool enable_shadows);
+    void        releaseShadowTargets();
+    void        releaseShadowTarget(U32 index);
 
 // 	void		setLocalLighting(const bool local_lighting);
 // 	bool		isLocalLightingEnabled() const;
@@ -283,6 +285,8 @@ public:
 	
 	void generateWaterReflection(LLCamera& camera);
 	void generateSunShadow(LLCamera& camera);
+    LLRenderTarget* getShadowTarget(U32 i);
+
 	void generateHighlight(LLCamera& camera);
 	void renderHighlight(const LLViewerObject* obj, F32 fade);
 	void setHighlightObject(LLDrawable* obj) { mHighlightObject = obj; }