Michael Andrews wrote:
> 
> Hi Rohan,
> 
> I haven't been able to get good results using small radiosity 'light'
> sources. Even with 1600 samples the source can be missed. Also, because
> of the way the samples are taken, the places where the source is hit
> tend to be the same size and shape as the source.
> 
> To get a better image I had to fiddle with the radiosity code. Now, each
> time the code starts taking samples at a point it chooses a random angle
> and rotates the sample directions around the surface normal by this amount.

Sounds logical, avoiding regular patterns by randomizing the sampling
directions without breaking their uniform distribution.

How much speed does this additional rotation cost?

One bad side effect would be the results will differ depending on the
tracing situation, a bit like jitter, which will lead to problems in
animations.

Christoph

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