Jaime Vives Piqueres wrote:

>   Not only this. You're using a damn slow combination: "area_light +
> radiosity + transparency". Try a test with a opaque texture for the
> plastic cover and you will see render time decrease. I've on my hands a
> scene with radiosity and 3 huge arealights, and the it renders not too
> bad until it reaches the first glass bottle. "Complicated CSG +
> radiosity" seems to not have such a drastic effect on render times if
> you don't make it transparent.

I've noticed that too. Transparency is already very difficult to handle with
radiosity, but I've almost given up on using radiosity + transparency + ior. In
my IRTC "contrast" picture, I had to remove a few bottles because of that. In
another instance, 1 single bottle with ior made the render impossibly slow, and
not only when it reached the bottle. Just removing the ior made it...
acceptably slow.

G.
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