That's really sharp.  I guess it wouldn't be possible to use trace() 
becasue there's no good place to "shoot" from (?)

Anyway, 2-3 hours doesn't sound like a lot to me, for 90,000 spheres. 
I've been doing some brute-force 3D mandelbrot sets on my old Mac G3, 
and I'll start a run before bed, and parsing generally finishes some 
time during breakfast.

I'd be interested in seeing the macro, once you're ready.

Thanks

Dave Matthews

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