[Radiance-general] Approximating the gross daylight flux through venetian blinds.

[Greg Ward]

I haven't read this paper -- thanks for pointing it out.  I know that 
Marilyne Anderson is continuing her measurement work now that she's at 
MIT.

Regarding your suggestion with the BRTDfunc, if I understand you 
correctly, you are suggesting that it might be possible to simulate the 
apprearance of slats in the model.  I agree, but I think that might 
defeat the purpose of using such a model, as we would be reintroducing 
irregularities in the light coming through that would then require 
heavier sampling to resolve.  That is the current problem with venetian 
blind models -- it's not that Radiance can't handle the complex 
geometry, quite the contrary.  It is simply that the slats themselves 
cause a large variance in the penetrating radiation, to the point where 
many ray samples are needed to resolve the agregate (i.e., integrated) 
behavior.

I hope I didn't misunderstand what you were saying.

-Greg