Actually, the reflectivity (or albedo) of the earth is a very important
phenomena.  Back when I was Atmospheric Chemistry simulation (i.e. solving
an approximation to the 3D multicomponent Navier-Stokes equation), albedo
was one of the most important parameters in understanding the impact of
solar radiation on the thermal characteristics of the planetary atmosphere.

--
Jim

Check out my web site  http://www.kressworks.com/

Steven Pigeon <pig### [at] iroumontrealca> wrote in message
news:38C59F76.A5401909@iro.umontreal.ca...
>
>
> Sigmund Kyrre Aas wrote:
>
> > Steven Pigeon wrote:
> > >
> > > Have anyone work'd out a good planetary ring texture?
> > >
> > > Best,
> >
> > This isn't bad at all. The rings on "our" planets vary greatly, so I
can't see
> > why these shouldn't be just as possible. Well, I'm not sure if you that
strong
> > highlight is realistic. And ambient should be 0 for planets.
>
> Actually, it is 0. But on the other hand earth shines quite a lot. It
doesreflect
> ~39% of the light it receives. A ring in low orbit would have a
> good 'earth shine'. If the moon does, after all...
>
>
> >
> >
> > I've made a fairly detailed Saturn ring texture, but I don't think you
can use
> > it for anything else. It's in the binaries.scene-files group if you're
> > interested, posted 28.11.99. It's also available from
> > http://www.stud.ntnu.no/~as/down.
> >
> > sig.
>
>
>
> --
> ----------------------------------------------------------
> Steven Pigeon                     Ph. D. Student.
> University of Montreal.
> pig### [at] iroumontrealca           Topics: data compression,
> pig### [at] jspumontrealca          signal processing,
> ste### [at] researchattcom           non stationnary signals
>                                   and wavelets.
> ----------------------------------------------------------
>          http://www.iro.umontreal.ca/~pigeon
>
>

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