"Greg M. Johnson" wrote:
> 
> ian mcdonald wrote:
> 
> > I never got it to work. I never came close. I don't even know where to start
> > beyond needing an intersection testing algorhythm.
> 
> You don't need that. The object function does the trick, plus knowing how the
> face centered cubic structure is stacked...
> 
> Here is the core of my algo:
> 
>    #declare obfun=pigment {object {MyObject color Black color White}}
                                     ^^^^^^^^
What's this?  

From what I understand, it is someway of making sure the inside of your
object is white, and the outside, black.  Am I right?

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