Optical illusion with blender

here is the classical optical illusion,done with blender
http://img346.imageshack.us/img346/3836/illusiongifbj0.png
http://img64.imageshack.us/img64/5630/illusion1ho4.png
if somebody doesnt know yet
the point of the illusion is that when you look at the center and move your head toward and away from the screen,the rings seem to be rotating.
BTW, the model is 100% 2d

EWW (SIC) Super Cool

Here is the illusion animated
shows that it really is 2d
damn it makes me dizzy to look it
[/IMG]
rotillusion2
http://img162.imageshack.us/img162/4496/rotillusionzw4.gif

probebly if it was rotated like a spiral it would more covicing.But it looks good as it is

Here is another optical illusion
it demonstrates how your brain adds green and red,and gets yellow.The colours are actually separated.
http://img60.imageshack.us/img60/7661/colorswi0.gif

another illusion
it looks like the camera is moving forward allong the halfpipe,but its not.again full 2d
http://img49.imageshack.us/img49/6459/halfpipeilvl6.gif