Stereogram Tutorial - how it works, step by step - IME-USP
https://www.ime.usp.br/~otuyama/stereogram/basic/index.html
WEBStereograms are illusions of 3D surfaces. This tutorial shows how it works, with a simple "do it by yourself" approach. The random dot stereogram is very easy to understand, although not a trivial concept. Unlike holograms that require laser beams, stereograms can be created, printed and visualized with computers.
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