shadows and hidden images?
 

Have you tried working with shadows and hidden images yet? Putting smaller 1,2, and 3 layer vynil images and shapes under larger pieces to create 3d and hidden images. You can do some neat stuff that looks pretty trick and only see it in the correct light or angle, you can also create texture to an otherwise 2d image

I've thought about it, but haven't really figured out a sticker to do it with.

ghost cock