"Kai" <nomail@nomail> wrote:
> To model a foam plastic object (like
> http://de.wikipedia.org/wiki/Datei:Haushaltsschwaemme.jpg ) I tried a
> appropriate surface texture combined with a dense scattered media.
>
> The results are good, except when some feature is placed in the foam object.
> Such a feature should only be visible on a very short distance below the
> surface, but it's visible throughout the whole object. I've tracked down this
> issue to the scattering media.
>
> In the following sample scene the blue cylinder should disappear quickly, but
> it's visible through the whole media filled box. If the box is divided into
> parts (just set fogDivisions > 1), the visibility issue get's better. With
> subdivisions one get's band artifacts, however, and for more complex objects
> this wouldn't be of much help anyhow. I'm using povray Unix 3.6.1.
>
> Are there better alternatives to model this case?
>
It sounded like an accuracy issue, so I tried adding "method 3 samples 100" to
the media statement.  This seemed to result in the appearance you're expecting.

~David

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