[Radiance-general] Can't get gensky to work without sun...

[P George Lovell]

Thanks Rob! I've just been hitting control+c each time I got the 
warning! Doh.

Thanks so much!

George


On 27/07/2011 15:05, Guglielmetti, Robert wrote:
> Hi George,
>
> The "no light sources found" error is because there is no sun in your sky
> model. The celestial hemisphere's sky glow is indeed just that, it's
> modeled as a "glow" source in Radiance. Glows are only picked up in the
> ambient calculation, so you need to have -ab set to at least 1. You have
> -ab 5, so you should be good. As the message states, it's not an error,
> merely a warning. You're good.
>
>
> Rob Guglielmetti  IESNA, LEED AP
> Commercial Buildings Research Group
> National Renewable Energy Laboratory
> 1617 Cole Blvd MS:RSF202
> Golden, CO 80401
> T. 303.275.4319
> F. 303.630.2055
> E. robert.guglielmetti at nrel.gov
>
>
>
>
>
> On 7/27/11 6:32 AM, "P George Lovell"<p.g.lovell at st-andrews.ac.uk>  wrote:
>
>> Hi Everyone,
>>
>> I'm trying to render some images for a perceptual experiment. When I
>> render with a sunlit sky (+s) I have no problems, but the variations in
>> illumination are too great - I need more uniformity. But when I change
>> the options to no sun (i.e. overcast "-c", or sunny without sun "-s") I
>> get an error from rpict:
>>
>> rpict: warning - no light sources found.
>>
>> Some key parameters:-
>>
>> gensky 01 01 13 +s -a 56.3400 -o  0 -m 0.00 -B 27.93<-- substitute "+s"
>> with "-c" or "-s"
>> skyfunc glow skyglow 0 0 4 1 1 1 0
>> skyglow source sky   0 0 4 0 0 1 180
>>
>> rpict" -vf j:\radiancefiles\27_07_2011_13_10_893074_#0\view.vf  -x 1800
>> -y 1800 -vh 15.30 -vv 15.30 -st 0.01 -ar 512 -aa 0.10 -ab 5 -lw 0.01000
>> -lr -10 j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.oct>
>> j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.rpict
>>
>> This is all running on mingw radiance on a windows PC. Anyone have any
>> suggestions?
>>
>> Thanks,
>>
>> George
>>
>>
>> --
>> Department of Psychology, University of St Andrews
>>
>>      RM 1.05 (The white room).
>>      Phone      (01334) 462090
>>
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-- 
Department of Psychology, University of St Andrews

     RM 1.05 (The white room).
     Phone      (01334) 462090