diff --git a/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl b/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl
index 3f90600ac..4f49f9a72 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/attachmentShadowV.glsl
@@ -41,10 +41,6 @@ void main()
 	
 
 	vec4 p = projection_matrix * vec4(pos, 1.0);
-#if !DEPTH_CLAMP
 	p.z = max(p.z, -p.w+0.01);
 	gl_Position = p;
-#else
-	gl_Position = p;
-#endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index 469b26497..58c18b4d9 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -169,10 +169,12 @@ void main()
 #ifndef HAS_ALPHA_MASK
 	color.a   = fogged.a;
 #endif
-#elif !HAS_ALPHA_MASK
+#else
+#ifndef HAS_ALPHA_MASK
 	color.a   = final_alpha;
 #endif
-#if HAS_ALPHA_MASK
+#endif
+#ifdef HAS_ALPHA_MASK
 	color.a = 0.0;
 #endif 
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index a3e754899..fe8fda374 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -83,6 +83,7 @@ uniform sampler2DShadow shadowMap1;
 uniform sampler2DShadow shadowMap2;
 uniform sampler2DShadow shadowMap3;
 uniform sampler2D noiseMap;
+VARYING vec2 vary_fragcoord;
 
 uniform mat4 shadow_matrix[6];
 uniform vec4 shadow_clip;
@@ -135,7 +136,6 @@ uniform mat3 env_mat;
 uniform mat3 ssao_effect_mat;
 
 uniform vec3 sun_dir;
-VARYING vec2 vary_fragcoord;
 
 VARYING vec3 vary_position;
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl
index 393d1e69d..95c741050 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialV.glsl
@@ -44,6 +44,10 @@ uniform mat4 modelview_matrix;
 #endif
 
 VARYING vec3 vary_position;
+#if HAS_SUN_SHADOW
+VARYING vec2 vary_fragcoord;
+uniform vec2 screen_res;
+#endif
 
 #endif
 
@@ -138,7 +142,11 @@ vary_normal  = n;
 
 #if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
 #if !HAS_SKIN
-	vary_position = (modelview_matrix*vec4(position.xyz, 1.0)).xyz;
+	vec3 pos = (modelview_matrix*vec4(position.xyz, 1.0)).xyz;
+	vary_position = pos;
+#endif
+#if HAS_SUN_SHADOW
+	vary_fragcoord = (pos.xy*0.5+0.5)*screen_res;
 #endif
 #endif
 }