OK, thanks. Never played around with photons before. I'll give it a shot. BTW,
it's "only" a 16 hour render at those settings...

nemesis <nam### [at] gmailcom> wrote:
> jhu escreveu:
> > Thanks! My global settings are listed below. What do you suggest I change?
>
> hmm, no photons for caustics?  It seems radiosity is creating some weird
> kind of caustics by its own, except it's black!
>
> Now, count 1000 and error_bound .05?!  whew!  Took a few days to render,
> huh? ;)
>
> In my radiosity scenes I like more fine-grained radiosity shading so I
> generally go for pretrace_start 0.04 and pretrace_end 0.008 or something
> like that.  But I go with error_bound .2:  it's acceptably slow and
> gives good results for the blending of blotches, specially coupled with
> nearest_count of about 16.  Count is about right, though I first try
> with lower counts, like 200 to 600...
>
> As for the dark spots, the correct way to get caustics in povray is with
> photons.  Radiosity has problems with black spots and glass surfaces.
> Use a first radiosity pass without the reflective or transparent
> surfaces, save that rca file and then render the final image with
> photons and the reflective/transparent surfaces back.  Test without
> photon first, then good luck. :)

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