This image was made because I was bored waiting for a map to calculate.
has a routine for making these magic-eye streograms
(Filters-->Render-->MagicEye). You feed it two images, a texture for
the background, and a grey-scale image of your subject where the
closest parts are darkest and the furthest parts are lightest, and out pops
one of these.
Use a finely-detailed texture, and a simple subject, and leave some space at the left-hand side of the subject or it will get cut off.
In case you haven't met these things before, you're supposed to stare at the picture, relax your eyes so that they stop converging, and out will pop a 3-D image. If it doesn't work sober, try after a couple of beers.
Mark Harris, Mar '99