"Roman Reiner" <lim### [at] gmxde> wrote:
> AFAIK this effect is caused by our brains as they expect the light coming
> from above. i find the attached example very impressive. in that case it is
> the opposite effect. a dome-shaped surface looking like a hole.

A concept also explored by our favourite graphic illusionist Maurits Escher,
in his print "Concave and Convex", i.e.

http://www.worldofescher.com/gallery/jpgs/P9L.jpg

Simple, but cool!

Bill

Post a reply to this message