Re: Most persistent optical illusion EVER

From: Hal Finney (hal@finney.org)
Date: Tue Oct 29 2002 - 23:45:07 MST

Here is an animated GIF showing one square moving onto the other:

http://waxy.org/random/images/weblog/checkershadow_animated.gif

and here is the picture modified with a constant-intensity bar
connecting the two squares (still hard to believe it though):

http://waxy.org/random/images/weblog/checkershadow_proof.jpg

Hal

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