No artist has ever worked harder to render the visions of his mind’s eye than M.C.Escher. The images here are just three of my favorites among his art pieces on TESSELLATIONS.

Tessellations are arrangements of polygons without gaps or overlappings, especially in a repeated pattern.

The top piece he entitled as “Day and Night”. See how the drawing is divided at the middle with each side being the day and night scene/s. See also how the polygons at the middle-bottom “metamorphose” upward into geese and how they tessellate towards both sides of the drawing.