[Radiance-general] glare evaluation

[Lars O. Grobe]

Hi Dharam!

> my question is now if i go by this index :-
> if i consider dgp it wil state "imperceptible glare" and
> if i consider dgi it will state "perceptible"

Did you read Jan's publications on the development of the DGP? It is not 
surprising to get different results using different methods - if the 
results were identical, Jan would have done the work for nothing. One of 
the keys is whether you have a large transmissive glazing/facade (high 
vertical illuminance) or more some small windows (high ratios max/min 
luminances). But again, it is best to read it from Jan's work, he spent 
some time on it. One more nice introduction by Jan is available here:

http://www.radiance-online.org/radiance-workshop8/Presentations/wienhold_rad_ws_2009_evalglare_intro.pdf

Cheers, Lars.

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