- this still doesn't work on Vulkan. :(

src/rendering/hwrenderer/utility/hw_shaderpatcher.cpp

@@ -271,7 +271,7 @@ const FDefaultShader defaultshaders[] =
 	{"Specular", "shaders/glsl/func_spec.fp", "shaders/glsl/material_specular.fp", "#define SPECULAR\n#define NORMALMAP\n"},
 	{"PBR","shaders/glsl/func_pbr.fp", "shaders/glsl/material_pbr.fp", "#define PBR\n#define NORMALMAP\n"},
 	{"Paletted",	"shaders/glsl/func_paletted.fp", "shaders/glsl/material_nolight.fp", ""},
-	{"No Texture", "shaders/glsl/func_notexture.fp", "shaders/glsl/material_normal.fp", ""},
+	{"No Texture", "shaders/glsl/func_notexture.fp", "shaders/glsl/material_normal.fp", "#define NO_LAYERS\n"},
 	{"Basic Fuzz", "shaders/glsl/fuzz_standard.fp", "shaders/glsl/material_normal.fp", ""},
 	{"Smooth Fuzz", "shaders/glsl/fuzz_smooth.fp", "shaders/glsl/material_normal.fp", ""},
 	{"Swirly Fuzz", "shaders/glsl/fuzz_swirly.fp", "shaders/glsl/material_normal.fp", ""},

src/rendering/vulkan/renderer/vk_renderstate.cpp

@@ -228,7 +228,7 @@ void VkRenderState::ApplyRenderPass(int dt)
 	pipelineKey.StencilPassOp = mStencilOp;
 	pipelineKey.ColorMask = mColorMask;
 	pipelineKey.CullMode = mCullMode;
-	pipelineKey.NumTextureLayers = mMaterial.mMaterial ? mMaterial.mMaterial->GetLayers() : 1; // Always force minimum 1 texture as the shader requires it
+	pipelineKey.NumTextureLayers = mMaterial.mMaterial ? mMaterial.mMaterial->GetLayers() : 4; // Always force minimum 1 texture as the shader requires it
 	if (mSpecialEffect > EFF_NONE)
 	{
 		pipelineKey.SpecialEffect = mSpecialEffect;
@@ -373,7 +373,7 @@ void VkRenderState::ApplyPushConstants()
 
 	mPushConstants.uFogEnabled = fogset;
 	int f = mTextureModeFlags;
-	if (!mBrightmapEnabled) f &= TEXF_Detailmap;
+	if (!mBrightmapEnabled)
 	mPushConstants.uTextureMode = (mTextureMode == TM_NORMAL && tempTM == TM_OPAQUE ? TM_OPAQUE : mTextureMode) | f;
 	mPushConstants.uLightDist = mLightParms[0];
 	mPushConstants.uLightFactor = mLightParms[1];

wadsrc/static/shaders/glsl/main.fp

@@ -543,6 +543,8 @@ void SetMaterialProps(inout Material material, vec2 texCoord)
 	material.Base = getTexel(texCoord.st); 
 	material.Normal = ApplyNormalMap(texCoord.st);
 
+// OpenGL doesn't care, but Vulkan pukes all over the place if these texture samplings are included in no-texture shaders, even though never called.
+#ifndef NO_LAYERS
 	if ((uTextureMode & TEXF_Brightmap) != 0)
 		material.Bright = texture(brighttexture, texCoord.st);
 		
@@ -554,6 +556,7 @@ void SetMaterialProps(inout Material material, vec2 texCoord)
 	
 	if ((uTextureMode & TEXF_Glowmap) != 0)
 		material.Glow = texture(glowtexture, texCoord.st);
+#endif
 }
 
 //===========================================================================