I don't think it's the same problem as with bending...

The normals are created with mathematical formulae, same with the
primitives - I am sure with the right combination of these two it would be
quite possible to do true surface deforms. The problem with bending is that
the mathematics behind bending a mathematical abstract is supposedly very
complex.

Well - I am not a maths guru, so if I am wrong, it won't surprize me too
much - it would be nice to know though...

-ss-

"Warp" <war### [at] tagpovrayorg> wrote in message
news:3c750e72@news.povray.org...

> : (is this answered in vfaq?)
>
>   It's the same problem as with bending:
>
> http://www.students.tut.fi/~warp/povQandT/languageQandT.html#bending

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