"Kari Kivisalo" <ray### [at] engineercom> wrote...
> Michael Andrews wrote:
> >
> > I'm posting the same file run on original MegaPov, my modified MegaPov
> > and v3.5b6. I'll put them as a reply to my previous post on p.b-t.b.
>
> Thanks.
>
> There are less artefacts but the ceiling and front side of the small
> box differ visibly. I would have expected the new image to more closely
> match the Cornell reference image but it doesn't. Maybe some other
> part of the code relies on the samples being taken the old way.

I think that the samples were generted and chosen in a specific order to
produce the best sampling with the fewest samples.  Also, the artifacts are
at least somewhat desired, since they smooth out the noise in the image.
Low-frequency noise is less perceptible to the human eye than high-frequency
noise.  Using the same set of sample vectors for each sample point yeilds
artifiacts and low-frequency noise, while using fully random sample vectors
produces high-frequency noise.

-Nathan

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