sitzmar! do what now?

The balls roll uphill – or do they?

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Optical illusions are cool. Computers are used every day to create amazing things that our eyes and minds perceive as real, even though they don’t exist. Much harder to create is an illusion in the real world that our eyes will believe in, without question.

This one, created by Koukichi Sugihara of the Meiji Institute for Advanced Study of Mathematical Sciences, won first prize in the 2010 Best Illusion of the Year contest. And it’s made entirely with real objects in the real world. No camera fakery, no CGI enhancements. As you’ll see, it all depends on your point of view. The deception is surprisingly simple, but incredibly effective.