Nathan Kopp wrote:
> 
> I've been working a bit on this with photon mapping.  If a global photon map
> is created, the directional data can be used so that you only shoot sample
> rays in directions where photons came from.

Now this is a great idea! But it doesn't work for purely ambient based light
sources, does it?

> When doing this, you have to
> use weights to compensate for the uneven distribution.  The code is in the
> UVPov source in photons.c (but isn't very well commented and is not
> currently used... but you can look at it if you like).  So, yes, this can
> efficiently be done.
> 

This is bound to give me a headache, but I might check it out...

Margus

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