Gary's shader fixes.

src/Shaders/ShadersInclude/bumpFragmentFunctions.fx

@@ -7,7 +7,7 @@
 		uniform mat4 normalMatrix;
 	#endif
 
-	vec3 perturbNormal(mat3 cotangentFrame, vec2 uv, vec3 textureSample, float scale)
+	vec3 perturbNormal(mat3 cotangentFrame, vec3 textureSample, float scale)
 	{
 		textureSample = textureSample * 2.0 - 1.0;
 
@@ -58,7 +58,7 @@
 
 	vec3 perturbNormal(mat3 cotangentFrame, vec2 uv)
 	{
-		return perturbNormal(cotangentFrame, uv, texture2D(bumpSampler, uv).xyz, vBumpInfos.y);
+		return perturbNormal(cotangentFrame, texture2D(bumpSampler, uv).xyz, vBumpInfos.y);
 	}
 
 	// Thanks to http://www.thetenthplanet.de/archives/1180

src/Shaders/ShadersInclude/pbrHelperFunctions.fx

@@ -7,7 +7,7 @@
 
 float convertRoughnessToAverageSlope(float roughness)
 {
-    // Calculate AlphaG as square of roughness; add epsilon to avoid numerical issues
+    // Calculate AlphaG as square of roughness (add epsilon to avoid numerical issues)
     return square(roughness) + MINIMUMVARIANCE;
 }
 

src/Shaders/pbr.fragment.fx

@@ -662,7 +662,7 @@ void main(void) {
                 clearCoatNormalW = normalize(texture2D(clearCoatBumpSampler, vClearCoatBumpUV + uvOffset).xyz  * 2.0 - 1.0);
                 clearCoatNormalW = normalize(mat3(normalMatrix) * clearCoatNormalW);
             #else
-                clearCoatNormalW = perturbNormal(TBN, vClearCoatBumpUV + uvOffset, texture2D(clearCoatBumpSampler, uv).xyz, vClearCoatBumpInfos.y);
+                clearCoatNormalW = perturbNormal(TBN, texture2D(clearCoatBumpSampler, vClearCoatBumpUV + uvOffset).xyz, vClearCoatBumpInfos.y);
             #endif
         #endif
 
@@ -895,7 +895,7 @@ void main(void) {
     #ifdef CLEARCOAT
         #if defined(ENVIRONMENTBRDF) && !defined(REFLECTIONMAP_SKYBOX)
             // BRDF Lookup
-            vec3 environmentClearCoatBrdf = getBRDFLookup(clearCoatNdotV, clearCoatRoughness, environmentBrdfSampler);
+            vec3 environmentClearCoatBrdf = getBRDFLookup(clearCoatNdotV, clearCoatRoughness);
             vec3 clearCoatEnvironmentReflectance = getReflectanceFromBRDFLookup(vec3(vClearCoatRefractionParams.x), environmentClearCoatBrdf);
 
             #ifdef RADIANCEOCCLUSION