diff --git a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
index dbcb995ba64afab0b99f75b8de878c365870cbcc..1dd697b43d6fc4331722f18e518770c0003b6af3 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
@@ -392,7 +392,7 @@ vec3 pbrIbl(vec3 diffuseColor,
             out vec3 specContrib)
 {
     // retrieve a scale and bias to F0. See [1], Figure 3
-    vec2 brdf = BRDF(clamp(nv, 0, 1), 1.0-perceptualRough);
+    vec2 brdf = BRDF(clamp(nv, 0, 1), perceptualRough);
     vec3 diffuseLight = irradiance;
     vec3 specularLight = radiance;
     
diff --git a/indra/newview/app_settings/shaders/class1/deferred/genbrdflutF.glsl b/indra/newview/app_settings/shaders/class1/deferred/genbrdflutF.glsl
index 9f01c289f52b0d673e37be1f10b31e5bf4096ec1..536538edd64d4699d059b1479574d0f64319f16b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/genbrdflutF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/genbrdflutF.glsl
@@ -135,5 +135,5 @@ vec2 BRDF(float NoV, float roughness)
 
 void main() 
 {
-	outColor = vec4(BRDF(vary_uv.s, 1.0-vary_uv.t), 0.0, 1.0);
+	outColor = vec4(BRDF(vary_uv.s, vary_uv.t), 0.0, 1.0);
 }
diff --git a/indra/newview/app_settings/shaders/class3/environment/waterF.glsl b/indra/newview/app_settings/shaders/class3/environment/waterF.glsl
index 2411542c59810e9dca5cc632b698a79e358e1ac6..a3a4a1a492abb6ad060fa7dfa0a2862d7e0005ea 100644
--- a/indra/newview/app_settings/shaders/class3/environment/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class3/environment/waterF.glsl
@@ -265,7 +265,7 @@ void main()
     color += ibl;
 
     float nv = clamp(abs(dot(norm.xyz, v)), 0.001, 1.0);
-    vec2 brdf = BRDF(clamp(nv, 0, 1), 1.0);
+    vec2 brdf = BRDF(clamp(nv, 0, 1), 0.0);
     float f = 1.0-brdf.x; //1.0 - (brdf.x+brdf.y);
     f *= 0.9;
     f *= f;