Fix dark ALM and strangeness at Mid lighting (class 3 but with a darkness about it).

Make a distinct class3/lighting/lightV which boosts to WL levels (* 2.0)
and make lighting without WL atmo enabled use class 2 or below.

Make forward shaders (alpha and materialF with alpha-blend mode on) more consistent with deferred lighting.

6 files changed, 15 insertions, 11 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index e8400ba66d..8709053ac6 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -201,7 +201,6 @@ void main()
  
     float final_da = da;
           final_da = clamp(final_da, 0.0f, 1.0f);
-		  final_da = pow(final_da, 1.0/1.3);
 
     vec4 color = vec4(0,0,0,0);
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index f1dbf4af46..5926236fd7 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -302,7 +302,6 @@ void main()
 
     float final_da = da;
           final_da = clamp(final_da, 0.0, 1.0);
-          final_da = pow(final_da, 1.0 / 1.3);
 
     float ambient = da;
     ambient *= 0.5;
@@ -372,6 +371,8 @@ vec3 post_spec = col.rgb;
         glare += cur_glare;
     }
 
+vec3 post_env = col.rgb;
+
     col = atmosFragLighting(col, additive, atten);
     col = scaleSoftClipFrag(col);
 
@@ -379,7 +380,7 @@ vec3 post_spec = col.rgb;
             
     vec3 light = vec3(0,0,0);
 
-    vec3 prelight_linearish_maybe = srgb_to_linear(col.rgb);
+vec3 post_atmo = col.rgb;
 
  #define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, npos, diffuse.rgb, final_specular, pos.xyz, norm.xyz, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z, glare, light_attenuation[i].w * 0.5);
 
@@ -393,7 +394,7 @@ vec3 post_spec = col.rgb;
 
 vec3 light_linear = light.rgb;
 
-    col.rgb += light.rgb;
+    col.rgb += light_linear;
 
 vec3 postlight_linear = col.rgb;
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index 68deedd0d0..83006c8916 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -108,7 +108,7 @@ void main()
         vec3 atten;
 
         calcAtmosphericVars(pos.xyz, 1.0, sunlit, amblit, additive, atten);
-        sunlit *= 0.5;
+
         float ambient = da;
         ambient *= 0.5;
         ambient *= ambient;
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
index dd70790fc3..2d5d1c1b50 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
@@ -120,7 +120,7 @@ void main()
         vec3 atten;
     
         calcAtmosphericVars(pos.xyz, ambocc, sunlit, amblit, additive, atten);
-        sunlit *= 0.5;
+
         float ambient = da;
         ambient *= 0.5;
         ambient *= ambient;
diff --git a/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl b/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
index b19f4e96ca..efe7f69f21 100644
--- a/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
+++ b/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
@@ -28,10 +28,9 @@
 // All lights, no specular highlights
 
 vec4 sumLights(vec3 pos, vec3 norm, vec4 color, vec4 baseLight);
-vec3 atmosAmbient(vec3 c);
+
 vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
 {
- 	vec4 l = sumLights(pos, norm, color, baseLight);
-    return l;
+	return sumLights(pos, norm, color, baseLight) * 2.0f;
 }
 
diff --git a/indra/newview/llviewershadermgr.cpp b/indra/newview/llviewershadermgr.cpp
index ebfdc38d50..0bd4a5eae0 100644
--- a/indra/newview/llviewershadermgr.cpp
+++ b/indra/newview/llviewershadermgr.cpp
@@ -478,7 +478,8 @@ void LLViewerShaderMgr::setShaders()
 		//using shaders, disable fixed function
 		LLGLSLShader::sNoFixedFunction = true;
 
-		S32 light_class = 2;
+		S32 light_class = 3;
+        S32 interface_class = 2;
 		S32 env_class = 2;
 		S32 obj_class = 2;
 		S32 effect_class = 2;
@@ -519,6 +520,10 @@ void LLViewerShaderMgr::setShaders()
             // windlight shaders to stub versions.
             wl_class = 2;
         }
+        else
+        {
+            light_class = 2;
+        }
 
 		// Trigger a full rebuild of the fallback skybox / cubemap if we've toggled windlight shaders
 		if (mShaderLevel[SHADER_WINDLIGHT] != wl_class && gSky.mVOSkyp.notNull())
@@ -528,7 +533,7 @@ void LLViewerShaderMgr::setShaders()
 
 		// Load lighting shaders
 		mShaderLevel[SHADER_LIGHTING] = light_class;
-		mShaderLevel[SHADER_INTERFACE] = light_class;
+		mShaderLevel[SHADER_INTERFACE] = interface_class;
 		mShaderLevel[SHADER_ENVIRONMENT] = env_class;
 		mShaderLevel[SHADER_WATER] = water_class;
 		mShaderLevel[SHADER_OBJECT] = obj_class;