Endless Stairs 3D Crazy Optical Illusion
Explanation
Because we live in a three dimensional world, we expect everything to be three dimensional. When we look at a two dimensional drawing, our mind tries to translate what we see into three dimensions.
This crazy optical illusion uses a perspective trick. Note that on two of the sides, there are three stairs. On the other two sides there are five. This was done to make the stairs line up and all look like they are at right angles in proper perspective.
Also, on the upper left side, the artist used the overlap technique. The stairs are drawn in a way that makes them look like they are on top of each other, which they cannot possible be in reality.
The problem of drawing three dimensional objects from two dimensional pictures allows for some pretty fun 3D Optical Illusions.
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