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Uncle Sam.wmv

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Uploaded on Feb 3, 2011

Featuring the world-famous Uncle Sam recruiting poster as hollow face illusion. The mask can be stood up in a window and the whole face seems to follow you as you move around. There is a video attached which will give you an idea of the illusion, although the real-world effect is a lot stronger than what we can show you here.

How does this amazing illusion work? Since our brain 'knows' that a face has to be convex, not concave, it will re-interpret the visual impression accordingly. When we move in front of the hollow image, the hollow face will move opposite to a convex one. While our brain cannot accept the face as concave, it has to interpret the visual perception differently and the only reasonable interpretation is that the face follows our movements.

The colored picture is made from full-color sandstone and can be customized with your own text.

Order a customized version of the picture in various sizes: http://www.trompe.nl/

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