Kelly M. Houle's Anamorphic Art.

This one is "Escher I: Double Reflection", based on Escher’s famous drawing.

This one is "Escher II: Infinite Reflection", a very unique "continuous infinite image":

A cylindrical mirror provides a way of bending the picture plane similar to the method described by Escher. By using anamorphic techniques, it is possible to form a continuous infinite image in three dimensions without changing the shape of the paper. The cylindrical anamorphosis shown here is based on a photograph of Escher looking at his own reflection in a spherical mirror.

Link