I was watching the star wars episode of family guy when i saw a similar illusion (the scene when they are looking at the Death Star Plans)
i made a more primitive version of this if you look at the small circle it rotates one way if you look at the big one it will rotate the other way but in reality they are just moving left and right and increasing/decreasing in scale. http://www.glossygames.com/sphere.html
i made a more primitive version of this if you look at the small circle it rotates one way if you look at the big one it will rotate the other way but in reality they are just moving left and right and increasing/decreasing in scale.
http://www.glossygames.com/sphere.html