1 files changed, 31 insertions, 23 deletions

diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index 970502f2d6..97557267cf 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -744,24 +744,25 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
 	, even if the "diffuseMap" will be appear and use first in shader code.
 
 	As example where this situation appear see: "Deferred Material Shader 28/29/30/31"
-	And tickets: MAINT-4165, MAINT-4839, MAINT-3568
+	And tickets: MAINT-4165, MAINT-4839, MAINT-3568, MAINT-6437
 	*/
 
 
 	S32 diffuseMap = glGetUniformLocationARB(mProgramObject, "diffuseMap");
+	S32 specularMap = glGetUniformLocationARB(mProgramObject, "specularMap");
 	S32 bumpMap = glGetUniformLocationARB(mProgramObject, "bumpMap");
 	S32 environmentMap = glGetUniformLocationARB(mProgramObject, "environmentMap");
 
 	std::set<S32> skip_index;
 
-	if (-1 != diffuseMap && (-1 != bumpMap || -1 != environmentMap))
+	if (-1 != diffuseMap && (-1 != specularMap || -1 != bumpMap || -1 != environmentMap))
 	{
 		GLenum type;
 		GLsizei length;
 		GLint size = -1;
 		char name[1024];
 
-		diffuseMap = bumpMap = environmentMap = -1;
+		diffuseMap = specularMap = bumpMap = environmentMap = -1;
 
 		for (S32 i = 0; i < activeCount; i++)
 		{
@@ -775,6 +776,18 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
 				continue;
 			}
 
+			if (-1 == specularMap && std::string(name) == "specularMap")
+			{
+				specularMap = i;
+				continue;
+			}
+
+			if (-1 == specularMap && std::string(name) == "specularMap")
+			{
+				specularMap = i;
+				continue;
+			}
+
 			if (-1 == bumpMap && std::string(name) == "bumpMap")
 			{
 				bumpMap = i;
@@ -788,34 +801,29 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
 			}
 		}
 
+		bool specularDiff = specularMap < diffuseMap && -1 != specularMap;
 		bool bumpLessDiff = bumpMap < diffuseMap && -1 != bumpMap;
 		bool envLessDiff = environmentMap < diffuseMap && -1 != environmentMap;
 
-		if (bumpLessDiff && envLessDiff)
+		if (specularDiff || bumpLessDiff || envLessDiff)
 		{
 			mapUniform(diffuseMap, uniforms);
-			mapUniform(bumpMap, uniforms);
-			mapUniform(environmentMap, uniforms);
-
 			skip_index.insert(diffuseMap);
-			skip_index.insert(bumpMap);
-			skip_index.insert(environmentMap);
-		}
-		else if (bumpLessDiff)
-		{
-			mapUniform(diffuseMap, uniforms);
-			mapUniform(bumpMap, uniforms);
 
-			skip_index.insert(diffuseMap);
-			skip_index.insert(bumpMap);
-		}
-		else if (envLessDiff)
-		{
-			mapUniform(diffuseMap, uniforms);
-			mapUniform(environmentMap, uniforms);
+			if (-1 != specularMap) {
+				mapUniform(specularMap, uniforms);
+				skip_index.insert(specularMap);
+			}
 
-			skip_index.insert(diffuseMap);
-			skip_index.insert(environmentMap);
+			if (-1 != bumpMap) {
+				mapUniform(bumpMap, uniforms);
+				skip_index.insert(bumpMap);
+			}
+
+			if (-1 != environmentMap) {
+				mapUniform(environmentMap, uniforms);
+				skip_index.insert(environmentMap);
+			}
 		}
 	}