Christian Froeschlin <chr### [at] chrfrde> wrote:

>
> Last weekend I was in the Escher Museum in The Hague and they had a
> nice exhibit (not by Escher, I think, this was on the uppermost floor
> where they show some related stuff about optical illusions) where a
> builing was portrayed in this manner on a saw-tooth shaped surface, so
> it looked like a normal image on a flat surface from the distance but
> started to "move" and "distort" unexpectedly as you walked towards
> it. Only when you got close and looked a bit from the side could
> you see what was going on ;)

*That* would be something to see!  I can't imagine what the visual effect would
be, though, seen in *true* 3-dimensions (unless you were to close one eye, to
eliminate the strange visual incongruity.) But that's probably what makes the
exhibit so fascinating.
>

>
> Projecting the image is only half the solution, it seems to
> me the critical thing is to define the correct geometry, so the
> moving camera will create not just any kind of random distortion
> but an approximation of the expected parallax distortion.
>

Yes indeed--as I found out ;-)

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