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<p>ambiguity than the Necker cube, which is less likely to be perceived as an impossible object. The illusion plays on the human eye's interpretation of two-dimensional pictures as three-dimensional objects. It is possible for three-dimensional objects to have the visual appearance of the impossible cube when seen from certain angles, either by making carefully placed cuts in the supposedly solid beams or by using <a href="page.php?w=forced_perspective">forced perspective</a>, but human experience with right-angled objects makes the impossible appearance</p><p>
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