Do you know what is a stereogram ? It's pictures where you see only a
pattern normaly, but when you squin or see in the far, form will pop-
up (in 3Dimentions).
If you have never seens that, then I advice you to take your time and
try to see the hidden informations of the pictures. See the exemple
below.
Bigle 3D is a stereogram generator or SIS (Single Image Stereogram).
To create you own stereograms, give a background, and an grayed image
that contain the 3D informations : So more an area is dark, so more
it's far away. Everything is realised in a Wizard.
You can know save your seteograms under the main images format (bmp,
png, jpg, tiff) and open even more types of images to create them.
http://www.alc-wbc.com/?id=8