2 files changed, 22 insertions, 7 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
index 9e194cdcd1..ad50690c02 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl
@@ -123,13 +123,20 @@ void main()
 			if (spec.a > 0.0)
 			{
 				//vec3 ref = dot(pos+lv, norm);
+				vec3 h = normalize(lv+npos);
+				float nh = dot(norm, h);
+				float nv = dot(norm, npos);
+				float vh = dot(npos, h);
+				float sa = nh;
+				vec3 fres = spec.rgb + pow(1 - dot(h, npos), 5) * (1 - spec.rgb);
+				float gtdenom = 2 * nh;
+				float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));
 				
-				float sa = dot(normalize(lv+npos),norm);
 				
 				if (sa > 0.0)
 				{
-					sa = texture2D(lightFunc, vec2(sa, spec.a)).r * min(dist_atten*4.0, 1.0);
-					col += da*sa*light_col[i].rgb*spec.rgb;
+					vec3 scol = (fres * texture2D(lightFunc, vec2(nh, spec.a)).r * gt) / (nh * da);
+					col += lit*scol*light_col[i].rgb;
 				}
 			}
 			
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
index fa1572e692..03b036375b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
@@ -107,12 +107,20 @@ void main()
 	vec4 spec = texture2DRect(specularRect, frag.xy);
 	if (spec.a > 0.0)
 	{
-		float sa = dot(normalize(lv-normalize(pos)),norm);
-		spec.rgb += pow(1 - dot(-normalize(pos), norm), 2) * da * 3;
+		vec3 npos = -normalize(pos);
+		vec3 h = normalize(lv+npos);
+		float nh = dot(norm, h);
+		float nv = dot(norm, npos);
+		float vh = dot(npos, h);
+		float sa = nh;
+		vec3 fres = spec.rgb + pow(1 - dot(h, npos), 5) * (1 - spec.rgb);
+		float gtdenom = 2 * nh;
+		float gt = max(0,(min(gtdenom * nv / vh, gtdenom * da / vh)));
+
 		if (sa > 0.0)
 		{
-			sa = texture2D(lightFunc, vec2(sa, spec.a)).r * min(dist_atten*4.0, 1.0);
-			col += da*sa*color.rgb*spec.rgb;
+			vec3 scol = (fres * texture2D(lightFunc, vec2(nh, spec.a)).r * gt) / (nh * da);
+			col += lit*scol*color.rgb;
 		}
 	}