EXP-2592 FIX -- (OS X Lion) Graphics issues with Atmospheric Shaders enabled on Intel HD 3000, 10.7.2

* Fixed up shaders to add haze_density and blue_density together correctly as vec4's rather than
  relying on the shader compiler to add them together properly.

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

@@ -99,7 +99,7 @@ void main()
 
 	// Sunlight attenuation effect (hue and brightness) due to atmosphere
 	// this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density * 1.0 + haze_density * 0.25) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
 
 	// Calculate relative weights
 	temp1 = blue_density + haze_density;

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

@@ -93,7 +93,7 @@ void main()
 
 	// Sunlight attenuation effect (hue and brightness) due to atmosphere
 	// this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density * 1.0 + haze_density * 0.25) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
 
 	// Calculate relative weights
 	temp1 = blue_density + haze_density;

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

@@ -159,7 +159,7 @@ void calcAtmospherics(vec3 inPositionEye, float ambFactor) {
 
 	//sunlight attenuation effect (hue and brightness) due to atmosphere
 	//this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density * 1.0 + vec4(haze_density) * 0.25) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
 		//I had thought blue_density and haze_density should have equal weighting,
 		//but attenuation due to haze_density tends to seem too strong
 

indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl

@@ -161,7 +161,7 @@ void calcAtmospherics(vec3 inPositionEye, float ambFactor) {
 
 	//sunlight attenuation effect (hue and brightness) due to atmosphere
 	//this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density * 1.0 + vec4(haze_density) * 0.25) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
 		//I had thought blue_density and haze_density should have equal weighting,
 		//but attenuation due to haze_density tends to seem too strong
 

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

@@ -78,7 +78,7 @@ void calcAtmospherics(vec3 inPositionEye) {
 
 	//sunlight attenuation effect (hue and brightness) due to atmosphere
 	//this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density * 1.0 + vec4(haze_density) * 0.25) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
 		//I had thought blue_density and haze_density should have equal weighting,
 		//but attenuation due to haze_density tends to seem too strong
 

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

@@ -98,7 +98,7 @@ void main()
 
 	// Sunlight attenuation effect (hue and brightness) due to atmosphere
 	// this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density * 1.0 + haze_density * 0.25) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
 
 	// Calculate relative weights
 	temp1 = blue_density + haze_density;

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

@@ -90,7 +90,7 @@ void main()
 
 	// Sunlight attenuation effect (hue and brightness) due to atmosphere
 	// this is used later for sunlight modulation at various altitudes
-	light_atten = (blue_density * 1.0 + haze_density * 0.25) * (density_multiplier * max_y);
+	light_atten = (blue_density + vec4(haze_density * 0.25)) * (density_multiplier * max_y);
 
 	// Calculate relative weights
 	temp1 = blue_density + haze_density;