Any way to merge multiple patched/composite texture lumps together?

[OliveTree]

Trying to merge two mods together. Neither contain new graphics but both have novel textures made from patches. I know how to combine a master collection of textures from individual image files but the texturex file is beyond me (assuming that's even the file I'm supposed to be paying attention to)

[esselfortium]

Slade will allow you to select textures from one TEXTURE1 lump and copy them to another, and it will automatically transfer the relevant patches with it. This isn't necessarily a foolproof solution to combining several wads together, though, as there's no automatic check for duplicate texture names or duplicate patch lump names.

[Worst]

In the texture browser you also have the context menu option to export a texture made of multiple patches to a single PNG file.