diff --git a/source/common/textures/hw_material.cpp b/source/common/textures/hw_material.cpp
index 4f5c301db..8df0b6298 100644
--- a/source/common/textures/hw_material.cpp
+++ b/source/common/textures/hw_material.cpp
@@ -83,30 +83,30 @@ FMaterial::FMaterial(FGameTexture * tx, int scaleflags)
 		auto placeholder = TexMan.GameByIndex(1);
 		if (tx->Brightmap.get())
 		{
-			mTextureLayers.Push({ tx->Brightmap.get(), scaleflags });
+			mTextureLayers.Push({ tx->Brightmap.get(), scaleflags, -1 });
 			mLayerFlags |= TEXF_Brightmap;
 		}
 		else	
 		{ 
-			mTextureLayers.Push({ placeholder->GetTexture(), 0 });
+			mTextureLayers.Push({ placeholder->GetTexture(), 0, -1 });
 		}
 		if (tx->Detailmap.get())
 		{
-			mTextureLayers.Push({ tx->Detailmap.get(), 0 });
+			mTextureLayers.Push({ tx->Detailmap.get(), 0, CLAMP_NONE });
 			mLayerFlags |= TEXF_Detailmap;
 		}
 		else
 		{
-			mTextureLayers.Push({ placeholder->GetTexture(), 0 });
+			mTextureLayers.Push({ placeholder->GetTexture(), 0, -1 });
 		}
 		if (tx->Glowmap.get())
 		{
-			mTextureLayers.Push({ tx->Glowmap.get(), scaleflags });
+			mTextureLayers.Push({ tx->Glowmap.get(), scaleflags, -1 });
 			mLayerFlags |= TEXF_Glowmap;
 		}
 		else
 		{
-			mTextureLayers.Push({ placeholder->GetTexture(), 0 });
+			mTextureLayers.Push({ placeholder->GetTexture(), 0, -1 });
 		}
 
 		auto index = tx->GetShaderIndex();
diff --git a/source/common/textures/hw_material.h b/source/common/textures/hw_material.h
index d7509cc94..e8c013d2b 100644
--- a/source/common/textures/hw_material.h
+++ b/source/common/textures/hw_material.h
@@ -12,6 +12,7 @@ struct MaterialLayerInfo
 {
 	FTexture* layerTexture;
 	int scaleFlags;
+	int clampflags;
 };
 
 //===========================================================================
@@ -37,6 +38,10 @@ public:
 	int GetShaderIndex() const { return mShaderIndex; }
 	int GetScaleFlags() const { return mScaleFlags; }
 	virtual void DeleteDescriptors() { }
+	FVector2 GetDetailScale() const
+	{
+		return sourcetex->GetDetailScale();
+	}
 
 	FGameTexture* Source() const
 	{
diff --git a/source/glbackend/gl_shader.cpp b/source/glbackend/gl_shader.cpp
index 9cdc56c50..ac7aa9d1a 100644
--- a/source/glbackend/gl_shader.cpp
+++ b/source/glbackend/gl_shader.cpp
@@ -148,11 +148,11 @@ bool PolymostShader::Load(const char * name, const char * vert_prog, const char
 	TintModulate.Init(hShader, "u_tintModulate");
 	TintOverlay.Init(hShader, "u_tintOverlay");
 	TintFlags.Init(hShader, "u_tintFlags");
+	DetailParms.Init(hShader, "u_detailParms");
 
     RotMatrix.Init(hShader, "u_rotMatrix");
 	ModelMatrix.Init(hShader, "u_modelMatrix");
 	ProjectionMatrix.Init(hShader, "u_projectionMatrix");
-	DetailMatrix.Init(hShader, "u_detailMatrix");
 	TextureMatrix.Init(hShader, "u_textureMatrix");
 
 
@@ -161,7 +161,6 @@ bool PolymostShader::Load(const char * name, const char * vert_prog, const char
 
 	VSMatrix identity(0);
 	TextureMatrix.Set(identity.get());
-	DetailMatrix.Set(identity.get());
 
 	int SamplerLoc;
     SamplerLoc = glGetUniformLocation(hShader, "s_texture");
diff --git a/source/glbackend/gl_shader.h b/source/glbackend/gl_shader.h
index a6eeaf05a..754174ba0 100644
--- a/source/glbackend/gl_shader.h
+++ b/source/glbackend/gl_shader.h
@@ -49,12 +49,12 @@ public:
 	FBufferedUniformPalEntry TintModulate;
 	FBufferedUniformPalEntry TintOverlay;
 	FBufferedUniform1i TintFlags;
+	FBufferedUniform2f DetailParms;
 
 
 	FUniformMatrix4f   RotMatrix;
 	FUniformMatrix4f   ModelMatrix;
 	FUniformMatrix4f   ProjectionMatrix;
-	FUniformMatrix4f   DetailMatrix;
 	FUniformMatrix4f   TextureMatrix;
 
 public:
diff --git a/source/glbackend/glbackend.cpp b/source/glbackend/glbackend.cpp
index d8539dd25..e1b58b435 100644
--- a/source/glbackend/glbackend.cpp
+++ b/source/glbackend/glbackend.cpp
@@ -194,7 +194,6 @@ void GLInstance::Draw(EDrawType type, size_t start, size_t count)
 	rendercommands.Push(renderState);
 	clearMapFog();
 	SetIdentityMatrix(Matrix_Texture);
-	SetIdentityMatrix(Matrix_Detail);
 	renderState.StateFlags &= ~(STF_CLEARCOLOR | STF_CLEARDEPTH | STF_VIEWPORTSET | STF_SCISSORSET);
 }
 
@@ -312,16 +311,17 @@ void PolymostRenderState::ApplyMaterial(FMaterial* mat, int clampmode, int trans
 	MaterialLayerInfo* layer;
 	auto base = static_cast<OpenGLRenderer::FHardwareTexture*>(mat->GetLayer(0, translation, &layer));
 	scf |= layer->scaleFlags;
-	if (base->BindOrCreate(layer->layerTexture, 0, clampmode, translation, scf))
+	if (base->BindOrCreate(layer->layerTexture, 0, layer->clampflags == -1? clampmode : layer->clampflags, translation, scf))
 	{
 		for (int i = 1; i < numLayers; i++)
 		{
 			auto systex = static_cast<OpenGLRenderer::FHardwareTexture*>(mat->GetLayer(i, 0, &layer));
 			// fixme: Upscale flags must be disabled for certain layers.
-			systex->BindOrCreate(layer->layerTexture, i, clampmode, 0, layer->scaleFlags);
+			systex->BindOrCreate(layer->layerTexture, i, layer->clampflags == -1 ? clampmode : layer->clampflags, 0, layer->scaleFlags);
 			maxbound = i;
 		}
 	}
+
 	// The palette lookup must be done manually.
 #if 0
 	// unbind everything from the last texture that's still active
@@ -343,6 +343,7 @@ void PolymostRenderState::Apply(PolymostShader* shader, GLState &oldState)
 	{
 		mMaterial.mChanged = false;
 		ApplyMaterial(mMaterial.mMaterial, mMaterial.mClampMode, mMaterial.mTranslation, mMaterial.mOverrideShader);
+		shader->DetailParms.Set(mMaterial.mMaterial->GetDetailScale().X, mMaterial.mMaterial->GetDetailScale().Y);
 	}
  
 	if (PaletteTexture != nullptr)
@@ -497,8 +498,6 @@ void PolymostRenderState::Apply(PolymostShader* shader, GLState &oldState)
 		shader->ProjectionMatrix.Set(matrixArray[matrixIndex[Matrix_Projection]].get());
 	if (matrixIndex[Matrix_Model] != -1)
 		shader->ModelMatrix.Set(matrixArray[matrixIndex[Matrix_Model]].get());
-	if (matrixIndex[Matrix_Detail] != -1)
-		shader->DetailMatrix.Set(matrixArray[matrixIndex[Matrix_Detail]].get());
 	if (matrixIndex[Matrix_Texture] != -1)
 		shader->TextureMatrix.Set(matrixArray[matrixIndex[Matrix_Texture]].get());
 	memset(matrixIndex, -1, sizeof(matrixIndex));
diff --git a/source/glbackend/hw_draw2d.cpp b/source/glbackend/hw_draw2d.cpp
index 0fc2040ea..b7a349786 100644
--- a/source/glbackend/hw_draw2d.cpp
+++ b/source/glbackend/hw_draw2d.cpp
@@ -104,7 +104,6 @@ void GLInstance::Draw2D(F2DDrawer *drawer)
 	VSMatrix mat(0);
 	SetIdentityMatrix(Matrix_View);
 	SetIdentityMatrix(Matrix_Model);
-	SetIdentityMatrix(Matrix_Detail);
 	mat.ortho(0, xdim, ydim, 0, -1, 1);
 	SetMatrix(Matrix_Projection, mat.get());
 	SetViewport(0, 0, xdim, ydim);
diff --git a/source/glbackend/pm_renderstate.h b/source/glbackend/pm_renderstate.h
index 7cbf798ca..e15899c52 100644
--- a/source/glbackend/pm_renderstate.h
+++ b/source/glbackend/pm_renderstate.h
@@ -12,7 +12,6 @@ enum EMatrixType
 	Matrix_View,
 	Matrix_Projection,
 	Matrix_Model,
-	Matrix_Detail,
 	Matrix_Texture,
 	// These are the only ones being used.
 	NUMMATRICES
@@ -71,7 +70,7 @@ struct PolymostRenderState
 	float AlphaThreshold = 0.5f;
 	bool AlphaTest = true;
 	float Color[4] = { 1,1,1,1 };
-	short matrixIndex[NUMMATRICES] = { 0,0,0,0,0 };
+	short matrixIndex[NUMMATRICES] = { 0,0,0,0 };
 	PalEntry fullscreenTint = 0xffffff, hictint = 0xffffff, hictint_overlay = 0xffffff;
 	int hictint_flags = -1;
 	FDepthBiasState mBias{ };
diff --git a/wadsrc/static/engine/shaders/glsl/polymost.vp b/wadsrc/static/engine/shaders/glsl/polymost.vp
index 3784f3db0..b2387ad02 100644
--- a/wadsrc/static/engine/shaders/glsl/polymost.vp
+++ b/wadsrc/static/engine/shaders/glsl/polymost.vp
@@ -11,8 +11,8 @@ uniform float u_usePalette;
 uniform mat4 u_rotMatrix;
 uniform mat4 u_modelMatrix;
 uniform mat4 u_projectionMatrix;
-uniform mat4 u_detailMatrix;
 uniform mat4 u_textureMatrix;
+uniform vec2 u_detailParms;
 
 in vec4 i_vertPos;
 in vec4 i_texCoord;
@@ -30,7 +30,7 @@ void main()
    eyeCoordPosition.xyz /= eyeCoordPosition.w;
 
    v_texCoord = u_textureMatrix * i_texCoord;
-   v_detailCoord = u_detailMatrix * i_texCoord;
+   v_detailCoord = vec4(i_texCoord.x * u_detailParms.x, i_texCoord.y * u_detailParms.y, 0.0, 0.0);
 
    v_fogCoord = abs(eyeCoordPosition.z);