[Radiance-general] genBSDF -n option doubt

[Germán Molina Larrain]

Thanks Greg!

Well, maybe I will see a difference when trying more complex geometries. I
am using the official Mac LBNL release (could not compile the Head one);
just for you to know.

In the other hand; I am trying to see the difference between the BSDF
generated when modeling a glazing using the "glass" primitive given by
Optics; and the BRTDfunc given by the same program. For now everything
suggest that the second one will need much more rays to converge... am I
right?

I am expecting to see difference in the reflecting part, not in the
transmitted part.

THANKS VERY MUCH

German

2013/1/30 Greg Ward <gregoryjward at gmail.com>

> Hi Germán,
>
> It should be fastest using the genBSDF -n option directly, rather than
> putting it in your -r option list.  Using the latest version of genBSDF
> from the HEAD, the -n option generally works pretty well in my experience.
>  In cases where the geometry and light interactions are very simple, there
> may not be much gain as the calculation is constrained by file i/o
> operations.  This is particularly true under Windows, which are forced to
> use ASCII rather than binary files due to the ages-old lack of any sensible
> end-of-file detection on that system.
>
> Cheers,
> -Greg
>
> *From: *Germán Molina Larrain <gmolina1 at uc.cl>
>
> *Date: *January 30, 2013 1:51:46 PM PST
>
> *
> *
>
> Dear list;
>
> I have been using the genBSDF a lot lately, and just today I decided to
> use both cores of my computer. Long story short, I tried the "-n" option
> directly on genBSDF, on the "r" options alone, in the "r" options with
> ambient file; nevertheless, I got my best results using just one core.
>
> What is correct (optimal) way of using parallel processing in genBSDF?
>
> THANKS VERY MUCH
>
> German
>
>
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