Impossible Animations  produced using the Escher Software:

Right click on image and choose Save Target As...

Wood Cuboid - Low quality 1.58Mb
Low Quality
Wood Cuboid - High quality 3.97Mb
High Quality
Chess Cuboid - Low quality 4.08Mb
Low Quality
Chess Cuboid - High quality 7.43Mb
High Quality
Endless Stairs - Low quality 4.40Mb
Low Quality
Endless Stairs - High quality 5.93Mb
High Quality
Rotating Tri-Bar - High quality 2.24Mb
High Quality