POV-Ray : Newsgroups : povray.general : Possible Bug: Vanishing Isosurface : Re: Possible Bug: Vanishing Isosurface Server Time
1 Aug 2024 00:17:33 EDT (-0400)
  Re: Possible Bug: Vanishing Isosurface  
From: Geodesic
Date: 12 Jun 2006 12:50:01
Message: <web.448d9a0cd595742c4524b9330@news.povray.org>
> Do you get a warning displayed in the messages pane? I get this:
>
>  Shutdown Warning: Evaluate found a maximum gradient of 0.000 and an
>  average gradient of 0.000. The maximum gradient variation was 0.000.
>  It is recommended to adjust the parameters of 'evaluate' to:
>  First parameter less than 0.000
>  Second parameter less than 1.000 and greater than 1.0
>  Third parameter greater than 1.000 and less than 1.0

Yeah, exactly that.

> I never really understood "eval", but if you use "maxgradient 250"
> you'll see the object. POVRay will still put a warning suggesting a
> higher max_gradient, but that's because there are tiny regions where y
> is large and x and z are close to zero where the gradient becomes very
> large indeed.

Hmm.  I changed to using eval because of speed issues with just using
maxgradient, but I'll try it.
Thanks


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