diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index 1acb76bdd10aa478ba666171649e06174233ecc1..ae579d7f85ed35a036de18372d28a8b347354224 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -225,7 +225,6 @@ void main()
     float ambient = da;
     ambient *= 0.5;
     ambient *= ambient;
-    ambient = max(getAmbientClamp(), ambient); // keeps shadows dark
     ambient = 1.0 - ambient;
 
     vec3 sun_contrib = min(final_da, shadow) * sunlit;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index cbb7a0463175b7fe4b7441ae2a033819a3f881f6..f7af3647a1e0a5c0ae25ae13dbbdfaf1fa568574 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -323,7 +323,6 @@ void main()
     float ambient = da;
     ambient *= 0.5;
     ambient *= ambient;
-    ambient = max(getAmbientClamp(), ambient);
     ambient = 1.0 - ambient;
 
     vec3 sun_contrib = min(final_da, shadow) * sunlit;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index afdd8cdda3a5089cae40b0877ecd1331406d9a45..bcd93d9a2d20f30ba9d16dd0d2984b0b6779038d 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -116,7 +116,6 @@ void main()
         float ambient = da;
         ambient *= 0.5;
         ambient *= ambient;
-        ambient = max(getAmbientClamp(), ambient);
         ambient = 1.0 - ambient;
 
         vec3 sun_contrib = final_da * sunlit;
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
index 06a76668bae24d6ecaf96b1a59dc99b2fffd6f89..7368b8d80cedbe9df387c816f6be77e209a5bc89 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
@@ -126,7 +126,6 @@ void main()
         float ambient = da;
         ambient *= 0.5;
         ambient *= ambient;
-        ambient = max(getAmbientClamp(), ambient);
         ambient = 1.0 - ambient;
 
         vec3 sun_contrib = scol * final_da * sunlit;
diff --git a/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl b/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
index 1ac0ad8948ad6be6924b1c196923be04755baba5..f5428077fa501fbc4e8a43e652bb8dbabba2fb64 100644
--- a/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
+++ b/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
@@ -31,8 +31,8 @@ vec4 sumLights(vec3 pos, vec3 norm, vec4 color);
 
 vec4 calcLighting(vec3 pos, vec3 norm, vec4 color)
 {
-	vec4 c = sumLights(pos, norm, color);
-    c.rgb += atmosAmbient() * color.rgb;
-    return c * 2.0;
+	vec4 c = sumLights(pos, norm, color) * 2.0;
+    c.rgb += atmosAmbient() * color.rgb * 0.5;
+    return c; 
 }