[Radiance-general] Modellling light pipes / light tubes

[Greg Ward]

Hi Brett,

I hesitate to suggest it, because I don't know exactly how (or even  
if) it would work, but the new rtcontrib program is meant to solve  
just this sort of problem.  If you are feeling adventurous, check it  
out.

-Greg

> From: "Beeson, Brett" <b.beeson at cundall.com.au>
> Date: November 27, 2005 3:01:24 PM PST
> Hi  all,
>
> I’ll like to model the effect of light pipes in a two storey  
> building.  These pipes would enter through the roof via a half-dome  
> of glass.  A highly reflective pipe (approximately 400mm diameter)  
> runs from this roof to the ground floor’s ceiling where it strikes  
> a diffuser and lights the space below.
>
> The obvious way to model this would be a vertical cylinder with a  
> highly reflective surface inside.  Probably the top surface (where  
> the light comes in) should be an illum surface.  I’m not sure,  
> however, that this method would be very efficient or accurate.
>
> What’s the best way to model these light pipes?  Has anyone done a  
> similar thing?
>
> Cheers,
>
> Brett
>