Hi, I am working on a space-based game and have made some spaceship models, but I'm having some trouble with the textures. I've used an old version of LithUnwrap to assign UV coordinates to the mesh so that I can put details like hull plating, alien symbols etc. on the hull, but I also want to have lit windows as well. I think that I'll need another texture with its blending mode set to "add" so that the windows look bright even when facing away from lights. How can I add the second texture and assign different UV coordinates to it but still keep the texture underneath the same?