How-To Geek

See a Live Action Checker Shadow Illusion [Video]

Commonly depicted in graphic form, this video showcases the well known Checker Shadow Illusion as a live action sequence.

The Checker Shadow Illusion–published by Edward H. Adelson, a Professor of Vision Science at MIT–is a popular optical illusion. In the illusion a square in the shadow of a cylinder is show to be exactly the same shade as a square outside the shadow, despite the two appearing very different to the eye. In the above video we’re treated to a live-action demonstration where the color of the squares seems to shift, chameleon like, right before our eyes.

Incredible Shade Illusion! [YouTube via DIY Photography]

Jason Fitzpatrick is warranty-voiding DIYer and all around geek. When he's not documenting mods and hacks he's doing his best to make sure a generation of college students graduate knowing they should put their pants on one leg at a time and go on to greatness, just like Bruce Dickinson. You can follow him on if you'd like.

  • Published 08/19/11

Comments (4)

  1. dima


  2. Hatryst

    Don’t forget to watch the other videos by the same uploader

  3. cee

    This illusion is a troll.

  4. Dan

    Nice; would of like to see her switch the cut out square to other square but not in the shadow of that canister?

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