"Rafal 'Raf256' Maj" <raf### [at] raf256com> wrote in 
news:Xns### [at] 204213191226:

[...]
> return j;

should be 

return priorJ;

imho same algorithm will halp in situations like
difference {
  cone { 0 1.0 y*1 1.0 }
  cone { 0 0.9 y*1 0.9 objId 1 }
}

I will tomorow describe exacly this idea, and some algorithms (including 
this optimized ones) on page http://www.raf256.com/pov/?new=1 (this page 
will be available about 25.06).

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