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	Basic Stuff To create stereograms, we need two images, a Depth Image, a grayscale image that PopOut Pro uses to interpret the depth of the hidden image, and a Colorfield Image , which PopOut Pro will use to create a wallpaper-like pattern in which to conceal the image.

	The Depth Image PopOut Pro uses the grayscale information to determine the depth of the hidden 3D image. In terms of front (closest to the viewer) and back (farthest from the viewer) white is in front and black is in back. The shades of gray fall in between. Looking at the depth image shown here, you can get a pretty good idea how the hidden image will look. In the depth image to the right, the hidden image will appear as if we are looking straight down onto the top of a pyramid. PopOut Pro modifies the texture of the colorfield image very subtly to hide the 3D image within the pattern. Furthermore, through the use of a sophisticated algorithm, the sections of the images are arranged so that each eye sees a slightly different image which our brains interpret as 3 Dimensional. Confused? Not to worry, we'll let PopOut Pro do all that algorithm stuff. Were artists, not mathematicians.