"Greg M. Johnson" wrote:
> 
> I found this page on the Japanese povray webring.
> 
> http://www.cs-w.com/~earth/material/isopattern.htm
> 
> There is here the use of the cells pattern in a way that does not give
> diffuse=0 on the edges of step functions.  I will study the source code,
> but the reason why it looks so good hasn't hit me yet.  Any clues?

I'm not totally sure what you mean by diffuse=0 but i suspect you meant the
problems occuring with abrupt steps in the pattern.  

You can see in the source code, that the critical patterns all use higher
max_gradient values (20/50) and there are still errors occuring although not
very strong.  On 'isopattern2.htm' they are even better visible.  

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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