Wait a minute (I should have, before I posted my last message, but you will
be used to this already :o})

While it's still strange what happens when f3*0 is involved, I could bring
up the turbulated marble by lowering the accuracy-value even more.
Probably the f3*0-problem is also resolvable by really high settings for
max_gradient and a sufficent small container. It's strange anyway, cause one
would not suspect accuracy problems when multiplying by zero, nor should
this increase the max_gradients.

Marc-Hendrik

Marc-Hendrik Bremer schrieb in Nachricht <3c0688b6@news.povray.org>...
>There is really something strange.
>
>- f3(x,y,z).gray*0.0 is supposed to be always 0 and therefore should not
>effect the isosurface at all, no? But it does influence the isosurface.
>
>In addition (and perhaps the problem the original author meant), the
>turbulated marble plane shows up as using no turbulence in the pigment
>statement while seen through the isosurface (container?). Lowering the
>accuracy-value seems not to have any effect 8tryed 0.0001. But by removing
>the turbulence in the marble pigment, everything renders as expected.
>
>Perhaps it's related to the marble + turbulence bug reported as fixed in
the
>next beta?
>
>Marc-Hendrik
>
>PII 450, 128 MB, Win 98, Pov 3.5 beta 7

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