I know a couple of visual artists who use a lot of "appropriated" images in their work--sometimes without changing them at all (these are often well-known commercial or corporate images, like the Marlboro cowboy). One of them has actually been contacted by attorneys for Philip Morris, who asked him to stop using their stuff. He did. Case closed. I think if you sold your tex for $5, you'd be so far under the radar nobody'd mess with you. You could also claim that your tex was a parody of any copyrighted/trademarked image or character; parodies are protected by the 1st amendment. Great tex/morphs, by the way. A bargain at 5 clams.