diff --git a/source/glbackend/gl_shader.cpp b/source/glbackend/gl_shader.cpp
index abdce6c65..88c9913bc 100644
--- a/source/glbackend/gl_shader.cpp
+++ b/source/glbackend/gl_shader.cpp
@@ -165,9 +165,15 @@ bool PolymostShader::Load(const char * name, const char * vert_prog, const char
 	GlowMatrix.Init(hShader, "u_glowMatrix");
 	TextureMatrix.Init(hShader, "u_textureMatrix");
 
+
     
 	glUseProgram(hShader);
 
+	VSMatrix identity(0);
+	TextureMatrix.Set(identity.get());
+	DetailMatrix.Set(identity.get());
+	GlowMatrix.Set(identity.get());
+
 	int SamplerLoc;
     SamplerLoc = glGetUniformLocation(hShader, "s_texture");
 	glUniform1i(SamplerLoc, 0);
diff --git a/wadsrc/static/demolition/shaders/glsl/polymost.vp b/wadsrc/static/demolition/shaders/glsl/polymost.vp
index 7a203943c..a46ca3a1a 100644
--- a/wadsrc/static/demolition/shaders/glsl/polymost.vp
+++ b/wadsrc/static/demolition/shaders/glsl/polymost.vp
@@ -13,6 +13,7 @@ uniform mat4 u_modelMatrix;
 uniform mat4 u_projectionMatrix;
 uniform mat4 u_detailMatrix;
 uniform mat4 u_glowMatrix;
+uniform mat4 u_textureMatrix;
 
 in vec4 i_vertPos;
 in vec4 i_texCoord;
@@ -30,9 +31,7 @@ void main()
 
    eyeCoordPosition.xyz /= eyeCoordPosition.w;
 
-   v_texCoord = i_texCoord;
-   //gl_TexCoord[0] = mix(gl_TexCoord[0].xyzw, gl_TexCoord[0].yxzw, u_usePalette); WTF is this???
-
+   v_texCoord = u_textureMatrix * i_texCoord;
    v_detailCoord = u_detailMatrix * i_texCoord;
    v_glowCoord = u_glowMatrix * i_texCoord;