Autostereograms

3D images hidden in 2D patterns ยท 1993

Made in 1993, shortly before the Magic Eye books came out, with a program written in Turbo Pascal 6.0. The originals were PCX images.

How to view them

  1. Each image has two squares above it. At 100% zoom they are about 3 cm apart; if not, zoom the page until they are.
  2. Look through the screen, as if at something far behind it, until the two squares double into four.
  3. Let the middle two drift together until you see three squares, and hold the middle one steady. This takes some practice.
  4. Keeping that focus, slowly lower your gaze into the image. The 3D picture appears.

Crossing your eyes instead also works, but shows the depth inside out.

Yin and yang
Bird on a branch
Motorcycle
Motorcyclist
Unfinished, on a circuit-board pattern