Triply Ambiguous Object

2018 First prize
Kokichi Sugihara: “Triply Ambiguous Object”. Japan

The object generates three different interpretations when it is seen from three special viewpoints. Most of existing ambiguous pictures/objects, such as Necker cube and Schroeder staircase, generate only two interpretations.
The present object consists of a 2D picture of a rectangular structure and a pole with a flag. The picture is placed on a horizontal surface and it is seen in slanted directions so that one group of parallel lines appears to be vertical. Then we perceive three different structures because they are compressed in different directions. The pole with a flag represents the direction of the gravity, which strengthens the illusion.

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