diff --git a/src/textures/formats/multipatchtexture.h b/src/textures/formats/multipatchtexture.h
new file mode 100644
index 000000000..28ff8dcc3
--- /dev/null
+++ b/src/textures/formats/multipatchtexture.h
@@ -0,0 +1,113 @@
+#pragma once
+
+//==========================================================================
+//
+// TexPart is the data that will get passed to the final texture.
+//
+//==========================================================================
+
+struct TexPart
+{
+	FRemapTable *Translation = nullptr;
+	FImageSource *Image = nullptr;
+	PalEntry Blend = 0;
+	blend_t Alpha = FRACUNIT;
+	int16_t OriginX = 0;
+	int16_t OriginY = 0;
+	uint8_t Rotate = 0;
+	uint8_t op = OP_COPY;
+};
+
+
+
+//==========================================================================
+//
+// A texture defined in a TEXTURE1 or TEXTURE2 lump
+//
+//==========================================================================
+
+class FMultiPatchTexture : public FImageSource
+{
+public:
+	FMultiPatchTexture(int w, int h, const TArray<TexPart> &parts, bool complex, bool textual);
+
+protected:
+	int NumParts;
+	bool bComplex;
+	bool bTextual;
+	TexPart *Parts;
+
+	// The getters must optionally redirect if it's a simple one-patch texture.
+	int CopyPixels(FBitmap *bmp, int conversion) override;
+	TArray<uint8_t> GetPalettedPixels(int conversion) override;
+	void CopyToBlock(uint8_t *dest, int dwidth, int dheight, FImageSource *source, int xpos, int ypos, int rotate, const uint8_t *translation, int style);
+};
+
+
+//==========================================================================
+//
+// Additional data per patch which is needed for initialization
+//
+//==========================================================================
+
+struct TexInit
+{
+	FString TexName;
+	ETextureType UseType = ETextureType::Null;
+	FTexture *Texture = nullptr;
+	bool Silent = false;
+	bool HasLine = false;
+	bool UseOffsets = false;
+	FScriptPosition sc;
+};
+
+//==========================================================================
+//
+// All build info only needed to construct the multipatch textures
+//
+//==========================================================================
+
+struct FPatchLookup;
+
+struct BuildInfo
+{
+	FString Name;
+	TArray<TexPart> Parts;
+	TArray<TexInit> Inits;
+	int Width = 0;
+	int Height = 0;
+	DVector2 Scale = { 1, 1 };
+	bool bWorldPanning = false;	// This sucks!
+	int DefinitionLump = 0;
+	bool bComplex = false;
+	bool textual = false;
+	bool bNoDecals = false;
+	int LeftOffset[2] = {};
+	int TopOffset[2] = {};
+	FTextureID id = {};
+	FImageTexture *tex = nullptr;
+};
+
+class FMultipatchTextureBuilder
+{
+	FTextureManager &TexMan;
+	TArray<BuildInfo> BuiltTextures;
+
+	void MakeTexture(BuildInfo &buildinfo, ETextureType usetype);
+
+	void BuildTexture(const void *texdef, FPatchLookup *patchlookup, int maxpatchnum, bool strife, int deflumpnum, ETextureType usetyoe);
+	void AddTexturesLump(const void *lumpdata, int lumpsize, int deflumpnum, int patcheslump, int firstdup, bool texture1);
+
+	void ParsePatch(FScanner &sc, BuildInfo &info, TexPart &part, TexInit &init);
+	void CheckForHacks(BuildInfo &buildinfo);
+	void ResolvePatches(BuildInfo &buildinfo);
+
+public:
+	FMultipatchTextureBuilder(FTextureManager &texMan) : TexMan(texMan)
+	{
+	}
+
+	void AddTexturesLumps(int lump1, int lump2, int patcheslump);
+	void ParseTexture(FScanner &sc, ETextureType usetype);
+	void ResolveAllPatches();
+};