"Kenneth" <kdw### [at] earthlinknet> wrote:
> Ive <"ive### [at] lilysoftorg"> wrote:
> > Warp wrote:
> > > Ive wrote:
> > >> ambient 0 in the finish statement, otherwise it would emit light.
> > >
> > >   That's what #default { finish { ambient 0 } } is for.
> >
> > This does not work if the texture already has a finish with ambient > 0.
>
> That's true.
>
> Actually there's already a very easy way to turn off ALL ambient light settings
> in a scene: global_settings{ambient_light 0}
>
> It's really a multiplier (which is why it's set up as <1,1,1> by default); a
> very useful little on/off ambient-light switch for running radiosity scenes.
>
> KW

I find that even worse - in a radiosity scene, you often want some objects to
give out light via an ambient term. Specifically with lightprobes, you need the
lightprobe image to be ambient X and diffuse 0. Radiosity based lightprobe
scenes often have no actual lights - all the lighting originates from the
lightprobe. Setting the global ambient multiplier to 0 turns off the lightprobe
in those cases, and your scene ends up black...

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