Probably I'm wrong, but shouldn't a *fresnel material* have its diffuse
value dependant on that angle too?

--
Jonathan.

"Christoph Hormann" <chr### [at] gmxde> ha scritto nel messaggio
news:3BECE593.4083C4F5@gmx.de...
>
>
> Slime wrote:
> >
> > This question applies to 3.5...
> >
> > So, what exactly the "Fresnel reflectivity function?" What sort of
> > calculations are going on with this? And it seems to create variable
> > reflection... is this more accurate than normally specifying two
reflection
> > values? I'm just wondering what this keyword is really *doing*...
> >
>
> Have a look at:
>
> http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/freseq.html
>
http://dustbunny.physics.indiana.edu/~dzierba/P360n/KPAD/Exps/Fresnel/fresne
lnote.pdf
>
> Normal variable reflection has a linear transit between min and max
> according to the cosine of the angle, if you use a higher falloff value
> you can get pretty much similar results, but note that the fresnel model
> depends on the ior of the material.
>
> Christoph
>
> --
> Christoph Hormann <chr### [at] gmxde>
> IsoWood include, radiosity tutorial, TransSkin and other
> things on: http://www.schunter.etc.tu-bs.de/~chris/

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