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/

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