sky luminance distribution

Hi

I am new to Radiance so I hope that you will be forgiving if my question has an obvious answer or if I am writing to the wrong list.

I would like to use Radiance with my own (measured) sky luminance distribution rather than using gensky to create a standard sky luminance distribution.

I have been looking at various manuals and userguides I have found online but seem unable to find any information relating specifically to this subject. Is it possible to do this? And if so how is it done?

Thanks for your help

Best Regards

Johannes Utoft Christensen

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I would like to use Radiance with my own (measured) sky luminance
distribution rather than using gensky to create a standard sky
luminance distribution.

What format is the measurement data contained in, how did you measure?

CU Lars.

Hi Johannes,

I would like to use Radiance with my own (measured) sky luminance distribution rather than using gensky to create a standard sky luminance distribution.

You need to use the brightdata format. How to do it for the Krochmann (145 patch) sky scanner is described in Chapter 3 found here:

http://www.iesd.dmu.ac.uk/~jm/zxcv-thesis/

Should be easy enough to adapt for other patch distributions.

-John

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-----------------------------------------------
Dr. John Mardaljevic
Senior Research Fellow
Institute of Energy and Sustainable Development
De Montfort University
The Gateway
Leicester
LE1 9BH, UK
+44 (0) 116 257 7972
+44 (0) 116 257 7981 (fax)

[email protected]
http://www.iesd.dmu.ac.uk/~jm