[Radiance-general] Perforated window shading

[Lars O. Grobe]

Hi Marcus!

> I'm doing a daylighting analysis of different facade configurations, and
> the architect is looking at perforated blinds shading, similar to i.e.
> this google image I found;
> 
> http://i01.i.aliimg.com/photo/v0/299829755/perforated_aluminum_blind.jpg
> 
> Is there any guidance or method to model this concept? Any references
> you could point me too?

1) If you can ignore the fact that the perforation leads to a
transmission not uniformly spread over the blind's surface, but
concentrated on the holes, you could use a trans modifier.

2) If you want to consider the pattern created by the perforation (if
you would look at it from very close distance), you can use mixfunc to
vary between the reflective surface (metal) and the transmissive holes
(void). You would need a procedural description of the perforation.

Cheers, Lars.