How convert Materials textures to ImageTextures?
Other world, I project a texture or make a procedural textured
MATERIAL and convert it an image (.tga, .jpg…) file.
Because I would use it with an image manipulator program like GIMP.
Just make your texture, put it either on a plane, or set is as your background image, render it, then go to save it, but instead of clicking on ‘save as’ click ‘save image’. That ought to do it.