P3D Re: Hollow Face Illusion

[George Themelis <gthemelis@xxxxxxxxx>]

> But my stereo vision tended to break the spell. 

Bruce, was the concave face that you saw lighted from the
bottom?  Light from the bottom reinforces the illusion.

How far away were you standing from it?  The further you stand
the stronger it is (since your depth perception is reduced).

For me it is so strong that many times I have to touch it to
go back to normal.  Maybe the construction is important too.
My "face" is totally white. With light from the bottom it
is only white or black (shadows).  Nothing to help you form
a good stereo image.

George

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George Themelis (DrT-3d@xxxxxxxxxxxxxxxx)
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