|
![](/i/fill.gif) |
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/fresnelnote.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] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
Post a reply to this message
|
![](/i/fill.gif) |