The Shepard elephant illusion
Also known as L’egs-istential Quandary or the impossible elephant is an optical illusion, of the type of impossible object, based on figure-ground confusion. As its creator Roger Shepard explains:[1]
The elephant…belongs to a class of objects that are truly impossible in that the object itself cannot be globally segregated from the nonobject or background. Parts of the object (in this case the elephant’s legs) become the background, and vice versa.
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