Thorsten Froehlich <tho### [at] trfde> wrote:
> > Distribution over a hemisphere is not enough for radiosity. There needs to be a
> > particular bias towards the "zenith".
>
> For small samples sizes, yes, but for large sample sizes assigning a weight
> to samples depending on their hemisphere location gives you the same effect.
>
>  Thorsten

Having this weight "built into" the samples still has some benefits though. It
saves you some multiplications or - if you don't pre-compute the sequence -
even some trigonometrics; better yet: You also don't waste time shooting rays
that don't contribute much.

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