DRTVWR-559 Auto exposure tuning (fix horizon).

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

@@ -91,7 +91,7 @@ void main()
     vary_LightNormPosDot = rel_pos_lightnorm_dot;
 
     // Initialize temp variables
-    vec3 sunlight = (sun_up_factor == 1) ? sunlight_color : moonlight_color;
+    vec3 sunlight = (sun_up_factor == 1) ? sunlight_color*2.0 : moonlight_color;
     
     // Sunlight attenuation effect (hue and brightness) due to atmosphere
     // this is used later for sunlight modulation at various altitudes

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

@@ -63,7 +63,9 @@ void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, ou
     vec3  rel_pos_norm = normalize(rel_pos);
     float rel_pos_len  = length(rel_pos);
     
+    float scale = sun_up_factor + 1;
     vec3  sunlight     = (sun_up_factor == 1) ? sunlight_color: moonlight_color;
+    sunlight *= scale;
 
     // sunlight attenuation effect (hue and brightness) due to atmosphere
     // this is used later for sunlight modulation at various altitudes
@@ -141,7 +143,7 @@ void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, ou
     
     // fudge sunlit and amblit to get consistent lighting compared to legacy
     // midday before PBR was a thing
-    sunlit = sunlight.rgb;
+    sunlit = sunlight.rgb / scale;
     amblit = tmpAmbient.rgb * 0.25;
 
     additive *= vec3(1.0 - combined_haze);

indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl

@@ -212,7 +212,6 @@ void main()
     {
         //should only be true of WL sky, just port over base color value
         color = srgb_to_linear(texture2D(emissiveRect, tc).rgb);
-        color *= sun_up_factor + 1.0;
     }
     else
     {