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

[Santiago Torres]

Yes, that`s what I meant. Now I understand the problem. I just thought it
would save some calculation of the interreflections between slats, but
surely that`s not significant.
Thank you for the clarification.

Santiago


> -----Original Message-----
> From: radiance-general-bounces at radiance-online.org
> [mailto:radiance-general-bounces at radiance-online.org]On Behalf Of
> Greg Ward
> Sent: Saturday, October 30, 2004 4:16 AM
> To: Radiance general discussion
> Subject: Re: [Radiance-general] Approximating the gross daylight
> flux throughvenetian blinds.
>
>
> 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
>
>
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