I have always loved optical illusions. There is one British painter named Patrick Hughes whose entire work concentrates on what he calls Reverspectives. These are paintings that when viewed by still photography are flat, but are not originally created so. (See the above illustration, and then the one below.) I suggest you take a look at the artist’s own website or this Futility Closet posting.
It never fails to amuse me how something so simple as perspective could be put on its end and played with. Take a look at his work and let me know what you think.