Bill Pragnell wrote:
> I have a question about copyright.
> 
> Over the last few months I've posted images (see p.b.i.) of my version of
> Escher's Double Planetoid illustration. I'm thinking of rendering some
> images, including this one, for exhibition on Zazzle. Although the image
> was completely generated from scratch by me, the inspiration and concept
> obviously come from Escher's work. My question is, would I be infringing
> any existing copyright by doing this? If so, is there a way around it (i.e.
> a credit to the original artist)?

Deciding if a work inspired by that of someone else is a derived work 
isn't always easy.  I'd say (but IANAL) that you are on the safe side if 
you can say you could reasonably have created your image without knowing 
of Escher's Double Planetoid.

Note the mere fact of a mathematical/geometric similarity is not an 
argument - you can't copyright a geometric figure per se or any other 
abstract idea.

Useful reading might be:

http://forums.cgsociety.org/showthread.php?t=281665

Christoph

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