Depth perception can be upset when rules and knowledge are in conflict, as you can see in these short videos of well-known visual illusions.

Ames' Window Ames Window video

This perspective window by Adelbert Ames upsets size-shape scaling to produce remarkable effects. Running time: 1min 19sec.

Ames Window video

Face Crate Face Crate video

Three objects - a fruit crate, a face mask in relief and a hollow face mask - are illuminated alternately from above and below. This demonstrates how our knowledge of faces can over-ride our perception of depth from shadows. Running time 1min 43sec.

Face Crate video

Charlie Chaplin Mask Charlie Chaplin Mask video

The rear of a mask of Charlie Chaplin is hollow but can appear convex, like a normal face. Running time 1min 58sec.

Charlie Chaplin Mask video

Videos and commentary are copyright © 2006, 2010, 2023 The Estate of Richard Gregory.

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