Many people write me and ask questions about creating stereograms. So I've compiled this Faq on the subject, and this software package to make stereograms.
vortexas2.gif (463K) [My personal favorite -- how far can you see?]
horsecolor.jpg (298K) Same as horseas, but with colored blobs instead of grey dither.
horse128.jpg (298K) Same as horseas, but with a 1/f random dither instead of completely random dither.
horse256.jpg (298K) Same as horse128, but with a larger 1/f random dither.
horseasinv.gif (545K) Same as horeas.gif, but for viewing via cross-eyed.