Ambiguous cylinder illusion and its explanation

This is just mind-boggling at first! Check out the video below to see the so-called ambiguous cylinder illusion. This shape looks like a round cylinder... but in the MIRROR it looks like a rectangular cylinder! (Or vice versa...) Amazing!


This trick with cylinders/squares comes from Kokichi Sugihara, an engineering professor at Meiji University in Japan.





And here WHY the illusion actually works...