[Radiance-general] mkillum with 400 sources?

[Mark de la Fuente]

One small trick I use (during the mkillum source creation) to speed up the process is to exclude interior geometry that does not affect the light coming into the space.  Also, if there is no exterior geometry, I've created arrays of processed illum planes rather than create many identical illums.
 
Hope that helps.
 
Mark

Message: 2
Date: Sun, 9 Oct 2005 18:22:57 +0200
From: "Lars O. Grobe" <grobe at gmx.net>
Subject: Re: [Radiance-general] mkillum with 400 sources?
To: Radiance general discussion <radiance-general at radiance-online.org>
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Hello again.

I have to ask this in a more general way. I have used mkillum to add 
some illum planes in front of the windows of my scene, and sealed the 
sides using zero-radiance illums. I am rendering the illums with -s=8 
-d=8, and in total there are about 400 calculated illums (and many more 
zero-radiance illums).

Now, I am experiencing even slower calculation with rpict. I guess it 
is because of all the illum sources. I think that I can reduce the -ab 
bounces because of the illum useage, which will give faster rendering 
times. But still I wonder if there is some kind of a magic limit of the 
number of illums to use. I mean, is there a number of illums where 
rendering speed decreases instead of increasing by the useage of the 
mkillum-tool ?

Are there any other ambient-parameters that I can change now that I 
have illums? I am thinking of ad, ar, aa, as the light environment is 
quite different now?

You see, I am still quite a beginner in this mkillum stuff, and a bit 
worried. Thanks for any help and hints, CU

Lars.

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