NORSPEC-342 WIP MATBUG-347 make impostor rendering not contribute to depth for mostly-transparent buffer pixels, aka hair in ALM only

1 files changed, 17 insertions, 2 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index d0c7cc9dde..f35ff25dcb 100755
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -531,6 +531,19 @@ void main()
 	vec4 diff = texture2D(diffuseMap,vary_texcoord0.xy);
 #endif
 
+#if FOR_IMPOSTOR
+	vec4 color;
+	color.rgb = diff.rgb;
+	color.a   = diff.a;
+
+	// Insure we don't pollute depth with invis pixels in impostor rendering
+	//
+	if (color.a < 0.01)
+	{
+		discard;
+	}
+#else
+
 #ifdef USE_VERTEX_COLOR
 	float final_alpha = diff.a * vertex_color.a;
 	diff.rgb *= vertex_color.rgb;
@@ -538,6 +551,7 @@ void main()
 	float final_alpha = diff.a;
 #endif
 
+
 	vec4 gamma_diff = diff;	
 	diff.rgb = srgb_to_linear(diff.rgb);
 
@@ -567,11 +581,10 @@ void main()
 	ambient = (1.0-ambient);
 
 	color.rgb *= ambient;
-
 	color.rgb += atmosAffectDirectionalLight(final_da);
 	color.rgb *= gamma_diff.rgb;
 
-	color.rgb = mix(diff.rgb, color.rgb, final_alpha);
+	//color.rgb = mix(diff.rgb, color.rgb, final_alpha);
 
 	color.rgb = atmosLighting(color.rgb);
 	color.rgb = scaleSoftClip(color.rgb);
@@ -602,6 +615,8 @@ void main()
 	color = applyWaterFogDeferred(pos.xyz, color);
 #endif
 
+#endif
+
 	frag_color = color;
 }