stereo tetris

SIRDS (Single Image Random Dot Stereograms) technology is a way to create images that look prominent when looking at and focusing on an image plane.
Thousands of them can be found on the net.
You can even find animated.

So, this is stereo-tetris.

PS
It may be easier if you put the monitor closer.
Pps
and move the mouse.
')
PS 2
zlogic also found a sird version of quake .
but this is a complete firework! :)