Alain wrote:
> Samuel Benge nous apporta ses lumieres en ce 2007/08/22 15:34:
>> If you have a way to calculate the normals for single faces (not the 
>> angle between two faces), by all means, let me know! Otherwise, I'm 
>> off to try the answer via Google....

> intersection{
> plane{Miler_indice, 1}
> .
> .
> .
> material{...}
> }

Attached is an image demonstrating the result of that approach.

Here is the code:
intersection{
  plane{z,1}
  plane{-z,1}

  plane{<0,-1,0>,3 }
  plane{<1,-1,0>,3 }
  plane{<1,0,0>,3 }
  plane{<0,1,0>,3 }
  plane{<-1,1,0>,3 }
  plane{<-1,0,0>,3 }

  pigment{rgb .5}
}

See the problem? These indices were supposed to make a hexagon, but 
instead produced 90 and 45 degree angles. Am I missing something?

Sam

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Preview of image 'wrong.jpg'