diff --git a/source/common/rendering/hwrenderer/data/hw_renderstate.h b/source/common/rendering/hwrenderer/data/hw_renderstate.h
index b61e23733..c52ef83ab 100644
--- a/source/common/rendering/hwrenderer/data/hw_renderstate.h
+++ b/source/common/rendering/hwrenderer/data/hw_renderstate.h
@@ -578,7 +578,7 @@ public:
 		mMaterial.mChanged = true;
 		mTextureModeFlags = mat->GetLayerFlags();
 		auto scale = mat->GetDetailScale();
-		mStreamData.uDetailParms = { scale.X, scale.Y, 0, 0 };
+		mStreamData.uDetailParms = { scale.X, scale.Y, 2, 0 };
 	}
 
 	void SetMaterial(FGameTexture* tex, EUpscaleFlags upscalemask, int scaleflags, int clampmode, int translation, int overrideshader)
diff --git a/wadsrc/static/shaders/glsl/main.fp b/wadsrc/static/shaders/glsl/main.fp
index d12d8affd..aa499eb8b 100644
--- a/wadsrc/static/shaders/glsl/main.fp
+++ b/wadsrc/static/shaders/glsl/main.fp
@@ -572,7 +572,7 @@ void SetMaterialProps(inout Material material, vec2 texCoord)
 	if ((uTextureMode & TEXF_Detailmap) != 0)
 	{
 		vec4 Detail = texture(detailtexture, texCoord.st * uDetailParms.xy) * uDetailParms.z;
-		material.Base *= Detail;
+		material.Base.rgb *= Detail.rgb;
 	}
 	
 	if ((uTextureMode & TEXF_Glowmap) != 0)