Animation

Some animations below are encoded with DivX codec, which can be found at http://www.divx.com

Animated Escher's litograph "Waterfall" (AVI - 39K)	Sphere driving down by the endless stair (AVI - 39K)
Rotating of the crazy crate (AVI - 32K)	Rotation of the figure that forms the impossible triange (AVI - 52K) (GIF - 71K)
Rotation of the figure that forms the impossible triangle (AVI - 174K)	Rotation of the figure that forms the complex impossible triangle (AVI - 214K)
Accurate animation of cuboid (AVI - 290K)	Animated Escher's image "Ascending and Descending" (GIF - 40K)

Other clips

http://www.photon.at/~werner/light/escher/anim.html
Rotation of crazy crate. This animation was made using raytracing program. Crazy crate is represented in perspective (not japanese projection). Crate's shadows were showed.