A stereoscopic representation of impossible rectangle twisted torus figure
中津 香奈, Tokiichiro Takahashi, Tomoaki Moriya · 2012
Impossible figure is a figure which looks realizable at first glance, but is not actually realizable as perceived by the human eyes. Optical illusion object is a three dimensional object made to be an impossible figure when viewed from a specific viewpoint. The viewpoint that realizes an optical illusion is called as an illusion viewpoint. An optical illusion object is not perceived as an impossible figure when a viewpoint moves away from an illusion viewpoint.