> I'm assuming that this is because radiosity uses some sort of random
numbers
> in the generation of the data.  If that's the case, it might be a nifty
> feature if the user could supply a "radiosity_seed Float" to ensure that
it
> used the same random seed.

Having the same random seed wouldn't mean you have the same data that was
calculated in the first rendering. To get that, you'd have to rerender from
scratch (using the seed) - which defeats the purpose.

 - Slime
 [ http://www.slimeland.com/ ]