Examples on BRTD

I'm a newbie of Radiance, I'm now trying to render the illumination in
a building with advanced window materials in Radiance. I've got the
raw BTDF data of these window materials. However, I don't know how to
use them in the material type BRTD. The information given in the
manual and reference are limitted. Could someone give me some examples
on how to use the BRTD function? Thanks a lot.

Yu

Hi Yu,

Try starting from here:

  http://radsite.lbl.gov/radiance/digests_html/v2n5.1.html#BRDF

Unfortunately, Radiance does not compute indirect lighting through BRDF materials except for the direct component. I am working on a specialty program, similar to mkillum, to handle cases where a BSDF material covers a window or skylight opening, but that is months away from completion.

Best,
-Greg

···

From: "Sheng Yu" <[email protected]>
Date: August 24, 2007 8:18:51 AM PDT

I'm a newbie of Radiance, I'm now trying to render the illumination in
a building with advanced window materials in Radiance. I've got the
raw BTDF data of these window materials. However, I don't know how to
use them in the material type BRTD. The information given in the
manual and reference are limitted. Could someone give me some examples
on how to use the BRTD function? Thanks a lot.

Yu