> It only pays off in case you can somehow manage to simplify the scene in
> a manner that does not affect radiosity calculation much; good
> candidates for this would be minor media  effects, micronormals for
> slightly blurred reflections, or low-res versions of textures. (Make
> sure not to change any actual geometry though.) In that case it's worth
> running the radiosity pretrace with this simplified scene, with low
> resolution to not waste much time on the not-really-main render; for the
> final render, you can then get away with a single, very coarse pretrace
> (IIRC POV-Ray always does at least one pretrace pass, even if you load
> previously generated data).

Ok, Thanks. I hopefully have understood most of it :). I'll keep this in mind
next time when I want to render a high-res radiosity scene.

Regards,

Simone

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