Nicolas George <nicolas$george@salle-s.org> wrote:
> As a more theoretical question, would it be possible, with the radiosity
> algorithm, to have different gray_threshold for each object?

I'm not sure. It's certainly not possible with the current implementation; I
don't know how easy (or worthwhile) a patch it would be.

> Is it enough to set the global_settings ambient_light to 0, or is it
> necessary to add a finish { ambient 0 } to each object in the scene.

From the documentation:

"The actual ambient used is: Ambient = Finish_Ambient * Global_Ambient."

So if you set global ambient = 0 then it will work fine. If you want nonzero
ambient light then it's better to use the #default finish { } and only
specify the ambient values you want to override.

Have fun. I like bright daylight scenes with radiosity, you can get some
really realistic results!

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