Merged in graham_linden/viewer-eep-g (pull request #388)

SL-11149

indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl

@@ -45,6 +45,8 @@ VARYING vec2 vary_texcoord0;
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 vec3 fullbrightAtmosTransport(vec3 light);
 vec3 fullbrightScaleSoftClip(vec3 light);
 
@@ -70,15 +72,17 @@ void main()
 #endif
 
 	color.rgb *= vertex_color.rgb;
-	
+
 #ifdef WATER_FOG
 	vec3 pos = vary_position;
 	vec4 fogged = applyWaterFogView(pos, vec4(color.rgb, final_alpha));
 	color.rgb = fogged.rgb;
 	color.a   = fogged.a;
 #else
+    color.rgb = srgb_to_linear(color.rgb);
 	color.rgb = fullbrightAtmosTransport(color.rgb);
 	color.rgb = fullbrightScaleSoftClip(color.rgb);
+    color.rgb = linear_to_srgb(color.rgb);
 	color.a   = final_alpha;
 #endif
 

indra/newview/app_settings/shaders/class2/windlight/transportF.glsl

@@ -50,10 +50,12 @@ vec3 atmosTransport(vec3 light)
 
 vec3 fullbrightAtmosTransport(vec3 light)
 {
-     return atmosTransportFrag(light,getAdditiveColor(), getAtmosAttenuation());
+    float brightness = dot(light.rgb, vec3(0.33333));
+    return atmosTransportFrag(light, getAdditiveColor() * (brightness * 0.5 + 0.5), getAtmosAttenuation());
 }
 
 vec3 fullbrightShinyAtmosTransport(vec3 light)
 {
-    return atmosTransportFrag(light,getAdditiveColor(), getAtmosAttenuation());
+    float brightness = dot(light.rgb, vec3(0.33333));
+    return atmosTransportFrag(light, getAdditiveColor() * (brightness * 0.5 + 0.5), getAtmosAttenuation());
 }