light_group {/*Lights And Isosurface*/}
plane {y,0 pigment {rgb 1} finish {ambient 1 diffuse 0}}

I'd guess that diffuse has nothing to do with shadows. But only a guess.
--
Farewell,
Bob

"Rafal 'Raf256' Maj" <raf### [at] raf256com> wrote in message
news:Xns### [at] 204213191226...
>
> 1. how can I tell POV to ignore all shadows that are casted on this object
> (plane)
> 2. does POV automaticly ignores all shadows for object with diffuse 0 ?
> 3. this plane alsow doesn't use phong,specular etc, so *all* light
> calulation for it can be ommited - does POV do it (for speed reasons ?)

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