This was assembled from the printed diagram at http://jclahr.com/science/Illusions/3d/dragon.jpg . If I did the filming okay, the effect should be wicked cool. If not, try to refocus your eyes and look again. (And yes, I made my dragon purple. I like purple!)
I was also recently informed that you can download and print the same dragon from http://www.grand-illusions.com/opticalillusio ns/three_dragons/ . I DEFINITELY didn't design this, I just printed it out and filmed it really fast to see if I could get the proper effect. :)