diff --git a/src/gl/data/gl_matrix.cpp b/src/gl/data/gl_matrix.cpp
index aa98a3c66a..35683dbb8e 100644
--- a/src/gl/data/gl_matrix.cpp
+++ b/src/gl/data/gl_matrix.cpp
@@ -40,7 +40,7 @@ VSMatrix::setIdentityMatrix( FLOATTYPE *mat, int size) {
 
 
 
-// glLoadIdentity implementation
+// gl LoadIdentity implementation
 void 
 VSMatrix::loadIdentity()
 {
@@ -54,7 +54,7 @@ VSMatrix::loadIdentity()
 }
 
 
-// glMultMatrix implementation
+// gl MultMatrix implementation
 void 
 VSMatrix::multMatrix(const FLOATTYPE *aMatrix)
 {
@@ -76,7 +76,7 @@ VSMatrix::multMatrix(const FLOATTYPE *aMatrix)
 }
 
 #ifdef USE_DOUBLE
-// glMultMatrix implementation
+// gl MultMatrix implementation
 void
 VSMatrix::multMatrix(const float *aMatrix)
 {
@@ -100,7 +100,7 @@ VSMatrix::multMatrix(const float *aMatrix)
 
 
 
-// glLoadMatrix implementation
+// gl LoadMatrix implementation
 void 
 VSMatrix::loadMatrix(const FLOATTYPE *aMatrix)
 {
@@ -108,7 +108,7 @@ VSMatrix::loadMatrix(const FLOATTYPE *aMatrix)
 }
 
 #ifdef USE_DOUBLE
-// glLoadMatrix implementation
+// gl LoadMatrix implementation
 void 
 VSMatrix::loadMatrix(const float *aMatrix)
 {
@@ -265,7 +265,7 @@ VSMatrix::perspective(FLOATTYPE fov, FLOATTYPE ratio, FLOATTYPE nearp, FLOATTYPE
 }
 
 
-// glOrtho implementation
+// gl Ortho implementation
 void 
 VSMatrix::ortho(FLOATTYPE left, FLOATTYPE right, 
 			FLOATTYPE bottom, FLOATTYPE top, 
@@ -282,7 +282,7 @@ VSMatrix::ortho(FLOATTYPE left, FLOATTYPE right,
 }
 
 
-// glFrustum implementation
+// gl Frustum implementation
 void 
 VSMatrix::frustum(FLOATTYPE left, FLOATTYPE right, 
 			FLOATTYPE bottom, FLOATTYPE top, 
diff --git a/src/gl/renderer/gl_renderstate.cpp b/src/gl/renderer/gl_renderstate.cpp
index 807912bcae..bee49cd969 100644
--- a/src/gl/renderer/gl_renderstate.cpp
+++ b/src/gl/renderer/gl_renderstate.cpp
@@ -74,11 +74,9 @@ void FRenderState::Reset()
 	mDesaturation = 0;
 	mSrcBlend = GL_SRC_ALPHA;
 	mDstBlend = GL_ONE_MINUS_SRC_ALPHA;
-	glSrcBlend = glDstBlend = -1;
 	mAlphaThreshold = 0.5f;
 	mBlendEquation = GL_FUNC_ADD;
 	mObjectColor = 0xffffffff;
-	glBlendEquation = -1;
 	m2D = true;
 	mVertexBuffer = mCurrentVertexBuffer = NULL;
 	mColormapState = CM_DEFAULT;
@@ -86,6 +84,10 @@ void FRenderState::Reset()
 	mSpecialEffect = EFF_NONE;
 	mClipHeightTop = 65536.f;
 	mClipHeightBottom = -65536.f;
+
+	stSrcBlend = stDstBlend = -1;
+	stBlendEquation = -1;
+	stAlphaThreshold = -1.f;
 }
 
 //==========================================================================
@@ -140,9 +142,9 @@ bool FRenderState::ApplyShader()
 #ifndef CORE_PROFILE
 	if (!(gl.flags & RFL_COREPROFILE))
 	{
-		if (mAlphaThreshold != glAlphaThreshold)
+		if (mAlphaThreshold != stAlphaThreshold)
 		{
-			glAlphaThreshold = mAlphaThreshold;
+			stAlphaThreshold = mAlphaThreshold;
 			if (mAlphaThreshold < 0.f)
 			{
 				glDisable(GL_ALPHA_TEST);
@@ -150,7 +152,7 @@ bool FRenderState::ApplyShader()
 			else
 			{
 				glEnable(GL_ALPHA_TEST);
-				glAlphaFunc(GL_GREATER, mAlphaThreshold);
+				glAlphaFunc(GL_GREATER, mAlphaThreshold * mColor.vec[3]);
 			}
 		}
 	}
@@ -271,16 +273,16 @@ void FRenderState::Apply()
 {
 	if (!gl_direct_state_change)
 	{
-		if (mSrcBlend != glSrcBlend || mDstBlend != glDstBlend)
+		if (mSrcBlend != stSrcBlend || mDstBlend != stDstBlend)
 		{
-			glSrcBlend = mSrcBlend;
-			glDstBlend = mDstBlend;
+			stSrcBlend = mSrcBlend;
+			stDstBlend = mDstBlend;
 			glBlendFunc(mSrcBlend, mDstBlend);
 		}
-		if (mBlendEquation != glBlendEquation)
+		if (mBlendEquation != stBlendEquation)
 		{
-			glBlendEquation = mBlendEquation;
-			::glBlendEquation(mBlendEquation);
+			stBlendEquation = mBlendEquation;
+			glBlendEquation(mBlendEquation);
 		}
 	}
 
diff --git a/src/gl/renderer/gl_renderstate.h b/src/gl/renderer/gl_renderstate.h
index 63fdab4ea5..562cfb0efc 100644
--- a/src/gl/renderer/gl_renderstate.h
+++ b/src/gl/renderer/gl_renderstate.h
@@ -75,12 +75,10 @@ class FRenderState
 	int mEffectState;
 	int mColormapState;
 
-	float glAlphaThreshold;
-	bool glClipOn;
-
-	int glSrcBlend, glDstBlend;
-	bool glAlphaTest;
-	int glBlendEquation;
+	float stAlphaThreshold;
+	int stSrcBlend, stDstBlend;
+	bool stAlphaTest;
+	int stBlendEquation;
 
 	bool ApplyShader();
 
@@ -299,7 +297,7 @@ public:
 		}
 		else
 		{
-			::glBlendEquation(eq);
+			glBlendEquation(eq);
 		}
 	}