Other Impossible 3D Structures

This picture demonstrates how viewpoint matters in perceiving impossible 3d objects.
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Check out this site for an explanation on how it is done, the history of and the psychological mechanisms responsible.

And here are some more 3-d impossible structures and animated java demonstrations on how the illusions are possible.
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Go here for the demos
There is a demo of the original impossible 3D object from the post a couple days ago at this site as well.

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Thank you so much for posting the "solutions". I was really wondering how the hell those figures were made. Though, even after seeing the explanation/rotations, they still look so real to me!

By Katherine (not verified) on 07 Mar 2007 #permalink

ohh yeah... thank Eamon and Brian for helping on this one :)