[Radiance-general] out of memory in avstore

[Casper Esmeijer]

Greg, Rob, Jack, Christopher,

Thanks for your response. The light pipes are lined with a diffuse material. So are all other 
surfaces. I hadn't thought of using mkillum. Probably the result of how a design process works. 
You start out with a plan, then it is slightly changed, some modifications are made and before 
you know it you are stuck with something completely different than you started with. 

Even though I realise a backward raytracer is not at it's best in these circumstances I'll give the 
illums a go and keep you posted. 

Casper

-----Original Message-----
From: Greg Ward <gregoryjward at gmail.com>
To: Radiance general discussion <radiance-general at radiance-online.org>
Date: Tue, 13 May 2008 11:21:55 -0700
Subject: Re: [Radiance-general] out of memory in avstore

> Hi Casper et al.,
> 
> I need a little more information about the material on the inside of  
> the light pipes.  Is it diffuse?  If not, then you probably don't  
> need all the ambient bounces.  Even if it is, Jack's idea for using  
> mkillum is a good one.  I'd try putting the illum surface on the  
> interior portal first, and set mkillum -aa 0 so there's no ambient  
> storage, decreasing other parameters to mkillum accordingly, e.g.:
> 
> 	mkillum -ab 0 -ad 256 -as 0 -ab 4
> 
> This will perform a pure Monte Carlo calculation in mkillum, which  
> will avoid the storage problem and still give you reasonable results.
> 
> As Jack points out, light pipes are not really Radiance's forte, and  
> down the line there will be better options, like using rtcontrib in a  
> more general ray-tracing precalculation.  Right now, you're sort of  
> stuck with mkillum.  If your interior surfaces are mirror-like, then  
> you may also avail yourself of the "mirror" type to handle redirected  
> sunlight, but only if you expect that.
> 
> Best,
> -Greg