The 'Zombie Chick' from Threed.

For an experimental effect, I added a glossy layer to the sunglasses such that when the painting is hanging on the wall of my apartment, and you're looking at it from a few feet away or more, my livingroom's light is reflecting off the glasses, obscuring the Giygas pattern. When you get closer to it though, your shadow casts onto the painting, canceling the reflection and revealing the Giygas images on the lenses. Each of the lenses is about the size of a quarter. A (bad) picture of the lenses reflecting can be seen here: http://starmen.net/forum/?t=getfile&id=36511&private=0