"Tim Attwood" <tim### [at] comcastnet> wrote:
> > The scene code is on the povcomp site for all to use:
>
> sky_sphere ...
>
> The radiosity engine only uses rays that travel finite
> distances, sky_sphere and background are both an
> infinite distance.  When a radiosity ray "leaks" thru
> a seam, and then goes infinite, that ray is considered
> pure black, which affects previous bounces of the
> ray, coloring them black as well. Higher quality
> settings means there are more rays to leak thru.
>
> You should use a large inverted sphere for sky
> in radiosity scenes, that way there will be no infinite
> rays at all. That should reduce the artifacts.


Hi Tim,

That's something I did not know, not completely sure it is affecting this image
as some of the black patches are on areas I am pretty confident do not have any
seam's but as I created this over 3 years ago (was povcomp really that long ago)
I don't remember too much about it.

I will wait to see how the current render is when it gets past the pretrace
stages and if I still have the black patches will give this a go. I think I
will try some experiments with this anyway without all the objects in the scene
to see if I can find out a bit sooner..

Sean

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