clipka <ano### [at] anonymousorg> wrote:
> Am 14.12.2012 12:46, schrieb Bruno Cabasson:
>
> > I take the occasion to say that such scenes would benefit from multi-cores
> > photon shooting.
>
> Multi-core photon shooting is automatically used /if/ the scene contains
> multiple light sources (or maybe multiple photon targets; I'm not sure
> about that though). With just one light source and a single photon
> target, it would be non-trivial to split up the job.

I am aware of this. Thus, I tried to use as many co-located light sources as
cores on the processor. All cores work fully loaded during the shooting phase,
but the subsequent render seems to be slowed down, probably because rays are
tested against all light sources instead on one.

The doc says POV-ray spawns as many threads for photon shooting as cores. I did
not see something about targets. But I can have missed it.

BTW, in extreme photon scenes, the spiral shape of the shooting process appears
on the result, and jitter is not really a perfect solution if you aim at a
smooth result.

B.

Suggestion: would it be possible to spawn multiple threads, and make the normal
photon generator feed them, like a kind of multiplexer?

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