"Stephen McAvoy" <mcavoys(at)AOLdotCOM> wrote in message
news:dak3vv4rbenfosgdr5ju5arqpobt9lfv93@4ax.com...
> On Tue, 30 Dec 2003 11:16:21 -0600, "Hughes, B." <omn### [at] charternet>
wrote:
>
> >Can also use a density
> >statement with smaller value than the default of rgb 1. Basically, you'll
be
> >adjusting all those values until you get what looks appropriate.
>
> That did it. Density with a gradient in the up direction works.

Even better, good to know you worked something out like that for it. Just
remember that light scattering in the air might be from particles floating
at the ceiling, or descended to the floor, at some intermediate level, or
turbulated around too. :-)

> >As to the additional lights you added to help illuminate the scene... I
> >would say you would cause unwanted affects (hilights, diffuse surfaces,
> >oversaturation) by brightening the scene using those (with large light
> >source color values), so probably not a good idea to do that.
>
> Is that a lucky guess? :-}

Educated guesses, usually.

> I'll have to work on this. One thing I found is that the spotlight does
not give
> the characteristic illuminated ellipse on the floor so I needed a second
one
> that does not react with media.

Not sure why you aren't seeing one, except maybe from light fading or media
attenuation causing dimming too much before reaching the floor. Or if the
floor finish has a low diffuse value too.

I'll post an example image at p.b.i. showing isotropic scattering media
having a few different values. It never is easy to fine-tune media together
with the lights, backgrounds, and objects. Probably because there can be
more to the visual perception than a texture alone has, at the risk of being
somewhat philosophical about it. ;-)

-- 
Bob H.
http://www.3digitaleyes.com

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