CTS-54 Fix for SSAO artifacts far away.

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

@@ -52,6 +52,12 @@ vec4 getPosition(vec2 pos_screen)
 
 //calculate decreases in ambient lighting when crowded out (SSAO)
 float calcAmbientOcclusion(vec4 pos, vec3 norm)
+{
+	float ret = 1.0;
+	
+	float dist = dot(pos.xyz,pos.xyz);
+	
+	if (dist < 64.0*64.0)
 	{
 		vec2 kern[8];
 		// exponentially (^2) distant occlusion samples spread around origin
@@ -97,7 +103,11 @@ float calcAmbientOcclusion(vec4 pos, vec3 norm)
 		
 		angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
 		
-	return (1.0 - (float(points != 0) * angle_hidden));
+		ret = (1.0 - (float(points != 0) * angle_hidden));
+		ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0);
+	}
+	
+	return min(ret, 1.0);
 }
 
 void main() 

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

@@ -54,6 +54,12 @@ vec4 getPosition(vec2 pos_screen)
 
 //calculate decreases in ambient lighting when crowded out (SSAO)
 float calcAmbientOcclusion(vec4 pos, vec3 norm)
+{
+	float ret = 1.0;
+	
+	float dist = dot(pos.xyz,pos.xyz);
+	
+	if (dist < 64.0*64.0)
 	{
 		vec2 kern[8];
 		// exponentially (^2) distant occlusion samples spread around origin
@@ -99,7 +105,11 @@ float calcAmbientOcclusion(vec4 pos, vec3 norm)
 		
 		angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
 		
-	return (1.0 - (float(points != 0) * angle_hidden));
+		ret = (1.0 - (float(points != 0) * angle_hidden));
+		ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0);
+	}
+	
+	return min(ret, 1.0);
 }
 
 float pcfShadow(sampler2DRectShadow shadowMap, vec4 stc, float scl)