I have a game file that I’m trying to export to a standalone runtime. However, two very old images have since gone missing, and because they can’t be found, Blender refuses to export. Making matters worse is that despite the images no longer being in use, they are incapable of being unlinked from the document. I’ve had this problem before, but have never found a solution except to ignore it. Now I’m in a position wherein I can’t.
I think you can create to dummy image files. Replace the texture source and un-link the texture.