"Thorsten Froehlich" <tho### [at] trfde> wrote in message
news:3bc9ccfc@news.povray.org...
> In article <3bc9bb8b@news.povray.org> , "Redbeard \(MDJohnson\)"
> <red### [at] wvadelphianet> wrote:
>
> > When rendering an isosurface with both max_gradient and evaluate on, I
receive
> > the following double warning.  It doesn't matter what max_gradient is set
to.
> >
> > File: E:\My Documents\MyProjects\Povray\Landscape.pov  Line: 26
> > Warning: The maximum gradient found was 1.401, but no default max_gradient
> > was set.
> >
> > File: E:\My Documents\MyProjects\Povray\Landscape.pov  Line: 26
> > Warning: The maximum gradient found was 1.401, but max_gradient of
> > the isosurface was set to 5.000. Adjust max_gradient to
> > get a faster rendering of the isosurface.
>
> Could you supply the scene please?
>
>
>     Thorsten

This isn't the exact scene, but it generates the error.  I don't think it
matters what the isosurface is.

isosurface
{
 function { y }
 max_gradient 1.925
 evaluate 1, 10, 0.99
 contained_by { box {-3,3 } }
 pigment { rgb 1 }
}

light_source { <100, 500,-20> rgb 1 }

camera { location <2,3,-1> look_at 0 }

Michael

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