[Radiance-general] Trans material sample with dynamic daylight simulation (rcontrib)

[Greg Ward]

Along the same lines, you can increase the -ss setting to 32 or 64 to get better specular sampling with trans and BSDF types.

Cheers,
-Greg

Sent from my iPad

On Jul 24, 2013, at 9:31 AM, Andrew McNeil <amcneil at lbl.gov> wrote:

> I don't have a sample project you can run, but I can offer some advice:
> 
> A standard daylight coefficient run with a trans material (or BSDF) is finicky because the the sky is sampled stochastically without regard to the position of the sun.  If your sampling density is low or you use a high resolution sky descretization scheme you might not fully sample the sky, missing patches.  If the sun happens to be in a missed patch your result will under estimate the illuminance. 
> 
> I'd recommend using high -ad parameter, low -lw parameter and use the tregenza sky (not reinhart).  Or better yet, use the 3-phase method.
> 
> I'd recommend running a few static sky conditions with rtrace to compare with your DDS results.
> 
> Andy
> 
> 
> 
> On Wed, Jul 24, 2013 at 1:53 AM, nassif nassif <nynassif at gmail.com> wrote:
>> hallo everyone,
>> 
>> I would like to ask you a favor: if anyone is able to send me a sample project or simple room with trans material, with results, which i can simulate in my computer. I am trying to simulate a project with dynamic daylight simulation (dds / rcontrib)  but i am not able to say if the results are correct or not.
>> 
>> in other word, i need a reference so to check if the results (according to my settings) i am getting are fine or not.
>> 
>> thx in advance,
>> 
>> 
>> -- 
>> N.Nassif
>> 
>> Lighting Designer
>> PLDA Member
>> 
>> 
>> 
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