Here's one iPad design that was printed with Spoonflower, then over printed with a thermofax of another iPad designed image.
Then here's what happened when I used it as a source image with Megaphoto.
Megaphoto is an almost unbelievable app, and as you can see I generated a whole new set of images. Next step: more Spoonflower uploads, so I will have a interestingly related set of fabrics! I could spend all my time and all my money, I'm afraid!