>   Most primitives have only one surface, yet that doesn't stop them from
> having an inside, even when this surface is open.

Yeah, I knew that. Discs are just planes with a limited visibily radius
(idiot speaking here, but that's kinda the code behind a disc, right?).
Which object wouldn't have an inside, so that nesting doesn't occur? Do
triangles have insides? Something that could replace the disc in the
particle system but doesn't add to nesting?

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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