Rejig deferred normal-map packing a little, to double its accuracy for free.

1 files changed, 2 insertions, 1 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl b/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl
index 6e38caf5ef..2197744a37 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/bumpF.glsl
@@ -24,5 +24,6 @@ void main()
 	gl_FragData[0] = vec4(col, 0.0);
 	gl_FragData[1] = gl_Color.aaaa; // spec
 	//gl_FragData[1] = vec4(vec3(gl_Color.a), gl_Color.a+(1.0-gl_Color.a)*gl_Color.a); // spec - from former class3 - maybe better, but not so well tested
-	gl_FragData[2] = vec4(normalize(tnorm)*0.5+0.5, 0.0);
+	vec3 nvn = normalize(tnorm);
+	gl_FragData[2] = vec4(nvn.xy * 0.5 + 0.5, nvn.z, 0.0);
 }