Ken wrote:
> 
> Mark Wagner wrote:
> >
> > Jon Wooldridge wrote in message <388C1D49.F23C00E1@gte.net>...
> > >Is it possible to create a normal_map (or similar) that does
> something
> > >like this, or do I have to resort to adding another cube?
> >
> > A normal_map or bump_map using negative bump heights should work.
> (No
> > guarentees, I've never used bump/normal maps).
> >
> > Mark
> 
>   Another thing you can do with bump maps images is to use black
> patterns
> on a white background. What this does is leave low areas where the
> pattern
> is and raises the rest of the surface in effect giving you negative
> bump
> mapping. On a two sided object such a sword blade you may have to
> split
> it into two pieces, front and back, to get a different pattern on each
> side and then union the two halves back together.
> 
> --
> Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing
> Links:
> http://home.pacbell.net/tylereng/index.html
> http://www.povray.org/links/

Would it be stupid to use a heightfield for this?

Remco

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