Umbra can be negative too.
On Thu, Feb 28, 2008 at 11:26 PM, Nick <nick.petit(at)gmail.com> wrote:
> You can, push the colour into negative values... The trouble is, you may end
> up with negative values if you're rendering to float and compers won't like
> you much, so make sure you clamp the surface shaders output value or do a
> clamp on the final images...
>
>
>
> On 29/02/2008, Eriya Ito <eriya.ito(at)grapecity.com> wrote:
> >
> >
> >
> >
> > Might be in a verge of insanity to ask this question but is there any work
> around
> >
> > to add a black light (spot or point)?
> >
> > I want to light up the whole scene with dark spots in certain places.
> >
> > I can use an object as a shadow but can't we have a black light? J
> >
> >
> >
> > Thanks,
> >
> > Eriya
>
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