nemesis wrote:
> 
> I feel that too:  Pixie is just like all renderers out there,
> obsessed with polygon meshes or the likes.  Other than POV, I
> don't know of any other renderer allowing for true mathematical
> surfaces as shape primitives...

Untested (and I don't know RIB well) code:

// POV-Ray SDL:
intersection {
   difference {
     sphere { <0,.5,0>, 1 pigment { rgb <1,0,0> } }
     sphere { <0,.5,0>, 1 pigment { rgb <0,1,0> } rotate z*120 }
   }
   sphere { <0,.5,0>, 1 pigment { rgb <0,0,1> } rotate z*240 }
   translate <1,2,3>
}

# Pixie RIB:
Surface "matte"
AttributeBegin
   Translate 1 2 3
   SolidBegin "intersection"
     SolidBegin "difference"
       AttributeBegin
         Color 1 0 0
         Translate 0 .5 0
         Sphere 1 -1 1 360
       AttributeEnd
       AttributeBegin
         Color 0 1 0
         Translate 0 .5 0
         Rotate 120 0 0 1
         Sphere 1 -1 1 360
       AttributeEnd
     SolidEnd
     AttributeBegin
       Color 0 0 1
       Translate 0 0.5 0
       Rotate 120 0 0 1
       Sphere 1 -1 1 360
     AttributeEnd
   SolidEnd
AttributeEnd

I don't want to start a drawn out POV vs. RIB comparison - I'm not 
qualified to do so even if I did want to. But, having used both, I will 
say that neither is a replacement for the other and that POV suits my 
needs better.

  -Shay

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