[Radiance-general] Re: rtcontrib parameter settings

[Gregory J. Ward]

Good catch.  I think -id3 would work just the same, and save memory,  
but what you have is fine.

-Greg

> From: "Andy Stone" <andy.stone at bdsp.com>
> Date: August 2, 2007 10:03:21 AM PDT
>
> Hi Greg,
>
> Thanks for the advice - it's sorted out my problem.  The only slight
> change that I made to the commands that you suggested was in the total
> command I added 216 after the -id option (since I have 72 modifiers  
> * 3
> colour channels=216 columns in the file):
>
> total -m -id216 -16 -od solar_coefficients16.bin >
> solar_coefficients.bin
>
> Thanks,
>
> Andy
>
>> A funny trick you can try is using multiple identical calculations
>> then averaging the result into your output file.  I recommend doing
>> this in two steps, so you can recover the run if you have to.  The
>> following would take 16 samples at each illuminance point and average
>> them together to reduce noise by a factor of 4:
>>
>> sed -n 'p;p;p;p;p;p;p;p;p;p;p;p;p;p;p;p' pluxmeters_test_office.txt \
>> 	| rtcontrib -V+ -o solar_coefficients16.bin \
>> 	-M sun_modifiers.txt -fad -ab 5 -ad 4096 -lw 1e-8 -I+ -h \
>> 	octrees/scene_with_suns.oct
>> total -m -id -16 -od solar_coefficients16.bin >  
>> solar_coefficients.bin
>> rm solar_coefficients16.bin