Hi, all.

I realized I couldn't make my IRTC image in time for the competition, so to
console myself I was modelling some other things.  I was fiddling with
Jaime's photo-studio and some of my own models, and now I have a
question...

In the scene, I have a blurred-reflective texture using Tim Nikias' method,
and it renders fast for one object (sphere) and **really** slow for another
(mesh spoon). Here is a bit of the code:

#declare t_utensil_WingsMat=texture{
  #if (use_radiosity<2)
    #if (BlurredRef)
      #declare Blurred_Reflection_Samples=10;
      #declare Blurriness=3;
      #declare NRand=seed(1);
      average texture_map{
        #declare Sample=1; #while (Sample<=Blurred_Reflection_Samples)
        [ 1 pigment{ Gray30 }
          normal {bozo Blurriness scale .05 translate
<rand(NRand),rand(NRand),rand(NRand)>*15}
          finish { reflection .4 }
        ]
        #declare Sample=Sample+1; #end
      }
    #else pigment {color Gray30} finish {reflection .4}
    #end
  #else pigment {color Gray30}
  #end
}

#declare Spoon=object {
    #include "spoon.inc"
    spoon
}

sphere {y*5,5 texture {t_utensil_WingsMat} translate <-17,80,3>}

object {Spoon scale 3.5 rotate y*56 translate <12,80,-33>}

And the spoon object is a wings mesh, looks like this:

#declare spoon = mesh2 {
vertex_vectors {1034,...(lots of vectors...)...}
normal_vectors {1034,...(lots of vectors...)...}
texture_list { 1,
 texture { t_utensil_WingsMat }
}
face_indices {2064,...(lots of vectors...)...}
normal_indices {2064,...(lots of vectors...)...}
}

use_radiosity is set to 1.

So, the sphere renders in about 10 minutes, focal blur and everything. The
spoon so far has taken 13.5 hours, and it's barely finished with the bowl
of the spoon. With ordinary reflection the spoon renders very quickly.

Any ideas? Thanks...

-Stefan Sittler

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