This checker optical illusion has been around for a while, If you look at the squares marked by A and B they are the exact shame shade of Grey, at first i didn’t believe it.. I actually had opened it up in photo shop to check!
I don’t see it, they are not the same, no matter how ya look at it!



This is a cool one, both squares are actually the same. if u hide other parts of the picture you can see it.