1 files changed, 7 insertions, 1 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl
index 4c68123fac..59d109b886 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/diffuseAlphaMaskIndexedF.glsl
@@ -36,6 +36,12 @@ uniform float minimum_alpha;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
+vec2 encode_normal(vec3 n)
+{
+	float f = sqrt(8 * n.z + 8);
+	return n.xy / f + 0.5;
+}
+
 void main() 
 {
 	vec4 col = diffuseLookup(vary_texcoord0.xy) * vertex_color;
@@ -48,5 +54,5 @@ void main()
 	frag_data[0] = vec4(col.rgb, 0.0);
 	frag_data[1] = vec4(0,0,0,0);
 	vec3 nvn = normalize(vary_normal);
-	frag_data[2] = vec4(nvn.xyz * 0.5 + 0.5, 0.0);
+	frag_data[2] = vec4(encode_normal(nvn.xyz), 0.0, 0.0);
 }