Here is a mask of Charlie Chaplin that rotates. Notice that, no matter how hard you try, the hollow and concave rear of the mask eventually becomes a convex golden face that spins counterclockwise. Pretty cool, give it a try:

Haven’t done a brain art post in a while, so figured I’d put up some pictures of Felice Varini’s incredible work. Note that these images were not ‘photoshopped’, nor do they use painted glass.

Crazy as this may seem, those little beans below are not moving!

(found here: National Institute of Environmental Health Sciences Pages)

In this neat optical illusion, is the blue line in the middle a perfect square?

(Imagine looking at this thing while intoxicated?!?)