Partial Disappearance Illusion

– Kokichi Sugihara: “Partial Disappearance Illusion”. Meiji University. Japan

Author description: There are three objects that look identical, but when we reflect them in the mirrors, different parts disappear. For the first object the rooster at the bottom disappears, for the second object the upper half of the structure disappears, and for the third object the lower half disappears. They all come from the height-reversal property of horizontal pictures; when we interpret a horizontal picture as a 3D object, the perceived height is reversed in the mirror. In fact the three objects are a mixture of 3D structures and 2D pictures, and the 2D pictures create unusual visual effects.

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