Schroeder stairs (Schröder's stairs) is an optical illusion which is a two-dimensional drawing which may be perceived either as a drawing of a staircase leading from left to right downwards or the same staircase only turned upside down. It is named after the German natural scientist Heinrich G. F. Schröder, who published it in 1858.
The Schroeder stairs appear in M. C. Escher's works "Relativity" and "Convex and Concave"
3D Schroeder Stairs
Dr. Kokishi Sugihara won 1st prize in the 2020 Illusion of the Year Contest for his 3D Schroeder Staircase:
Dr. Kokishi Sugihara won 1st prize in the 2020 Illusion of the Year Contest for his 3D Schroeder Staircase:
Best Illusion of the Year Contest: 2020 Finalist
The Illusion Index: Schroeder's Stairs
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