This Demonstration constructs an autostereogram, a single-image stereogram that creates the visual illusion of a 3D image from a 2D image. You can vary the pattern, the number of strips, and the depth factor. The depth factor, a decimal value between 0 and 1, controls the amount of depth perception in the image. To construct a new autostereogram, change the parameters and then click the "evaluate" button.
To create this image, a depth map of the hidden 3D image (a torus) was first made using Region3DPlot and color effects. Then, pixels were computed from a pattern strip (specified by the user) and the depth map to create the autostereogram.
 H. W. Thimbleby, S. Inglis, and I. H. Witten, "Displaying 3D Images: Algorithms for Single-Image Random-Dot Stereograms," IEEE Computer, 27(10), 1994 pp. 38–48.