[Radiance-general] BRDF material description

[Gregory J. Ward]

Hello Ilya,

I don't have a very fast network connection, and can't remember  
exactly what parameters are given in Ngan et al's supplement.  You  
basically have to ignore the color of the specular component for the  
plastic and metal materials, which use the Ward-Duer reflection  
model.  Is that what's worrying you?

-Greg

> From: webmaster at audice.com
> Date: September 20, 2006 8:34:46 AM BDT
>
> Dear Greg,
>
> Thank you very much for your highly detailed answer to my question!
> Unfortunately, I'd like to ask you another (this time Ward model
> related).
>
> Where can I enter these Ward-Duer fits in Radiance? I have not
> found any Ward model associated .cal scripts in Radiance. There is
> only He-Torrence (He.cal, He3.cal) model.
>
> The Radiance materials themself are based on a Ward model I suppose?!
> But where can I enter these values? BRTDfunc material description
> needs a corresponding .cal script file to work?! Other material types,
> like anisotrophic version of plastic, do not have enough parameters to
> specify associated data.
>
> I use Radiance v3.7.2 (cygwin/X build).
>
> I'm sorry for taking your time!
> -- 
> Best Regards,
> Ilya A. Zimnovich                          mailto:webmaster at audice.com