[Radiance-general] better results on genBSDF

[Germán Molina Larrain]

Hi Lars,

considering that the specular transmission is that light that does not
touch any surface, the analytical solution would be the exact one (am I
right?). Also, HERE<http://windows.lbl.gov/materials/optics/Bidirectional%20Properties%20of%20Slat%20Shading.pdf>,
those results were compared agains TracePro, and the results of the forward
ray-tracing gave, basically, the same results as the model I am using.

THANKS

German

2013/2/16 Lars O. Grobe <grobe at gmx.net>

> Hi German!
>
> > I am using genBSDF to get the BTDF of a shading system, comparing it to
> > an analytical model using the radiosity method. No surprise, the
> > calculations seem to be really good, nevertheless, there are some
> > important differences on directly transmitted (specular) calculations. I
>
> Why do you think that "an analytical model using the radiosity method"
> results in "better" results than raytracing does for specular transmission?
>
> Cheers, Lars.
>
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