It actually reminded me of an amazing illusion I encountered as part of a Psychology 3 lab last semester. Here's how it worked: A two dimensional projection of a cube (about 2 feet per side) was modeled using wood. After we had established the illusion of three dimensions, we were instructed to close one eye and then move around the room while still looking at the two dimensional projection. The illusion of a three dimensional cube could be maintained the whole time, with strange effects on perception. Everything looked okay, but the rotation was not correct. Since the cube was not actually three dimensional, the rotation which we perceived was somehow backwards. I'm still not exactly sure how to explain it, but I thought it was an interesting demonstration of the way the mind perceives depth.
Dan Margalit's week 9 paper.
Michael Matthews' week 8 paper. (Nice scanned images!)