Viewpoint illusions 3D

About this app

Four illusions that only work from a single viewpoint, as walk-around 3D stations: Ames room (giant and dwarf; the people swap corners), Penrose triangle as a real object with a gap, Beuchet chair and a rotating hollow mask with switchable lighting. A viewpoint slider moves from the peephole to the outside view. True shape, lines of sight and readouts show why the brain picks the most probable interpretation of an ambiguous retinal image.

Subject: Perception & Illusion

More from Perception & Illusion

• Adversarial examples
• Color constancy
• Mental rotation (Shepard & Metzler)
• Optical illusions
• Place cells & grid cells (3D)

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