Mike Williams wrote:

> Yes. I accumulated the brightnesses in an array and then only created
> spheres where the brightness was non-zero. It wasn't particularly
> efficient. 2h 47m 59s on a 850MHz Celeron.
> 

Thanks.  That's still a big improvement over my methods.  I was creating 
the spheres, storing each location in an array, then running a new 
comparison each time to see whether I already had a sphere. . . . I 
still don't think enough like a programmer.

Well, now I can give it a go on a 3D IFS and see what comes out.

Thanks again!

Dave Matthews

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