"Kenneth" <kdw### [at] earthlinknet> schreef in bericht 
news:web.47ed38cef97379d78dcad930@news.povray.org...
>
> Yes, you were absolutely right! (Alain has mentioned the same, in other 
> recent
> posts.) *Had* to do some rigorous tests of my own, though, digging deep, 
> just
> to set my mind at ease. :-)
>
> It's definitely a strange situation, adding that extra green sphere. It 
> has to
> be some kind of deeply-hidden bug. In the isosurface code? The object 
> media
> code? Some other mysterious thing??
>
> Up until now, I had thought that max_trace and all_intersections only had 
> an
> effect when there was CSG with the isosurface. I guess that just ain't so! 
> A
> very useful discovery.
>

Yes, it seems weird indeed. My first reaction was also that as there was no 
use of the isosurface in a CSG, the max_trace could remain at its default 
value. Either we misunderstand something (I wouldn't be surprised) or it is 
a bug with the isosurface code. Maybe an expert could light our lantern...?

Thomas

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