Something else I just cooked up for fun
Pretty much this: you can only use whatever render/extraction in your sig. Duplicate it, use filters on it, smudge, whatever! Excluding text, borders, and adjustment layers, you can't use anything else >:] So delete that background layer, and get creative!
Just to clarify, that means you can only use the render you picked out, not other random renders. Apply image is fine as well.
---------- Post added at 10:48 AM ---------- Previous post was at 09:19 AM ----------
No brushes, for the lighting, I used the layers and set them to multiply/screen, then erased what I didn't need .