[Radiance-general] Surfaces Roughness and simulation parameters

[Greg Ward]

Hi Giovanni,

Set "-u+" to turn on random Monte Carlo sampling if the pattern bothers you.   You'll get a noisier image, but without the brushed look of the low discrepancy sequence rpict normally uses.

-Greg

> From: "Giovanni Betti" <gbetti at fosterandpartners.com>
> Date: July 12, 2011 11:43:02 AM PDT
> 
> Dear List, 
> 
> I was trying to simulate the visual appearance of brushed alluminum, but
> I am struggling with the roughness of the materials.
> 
> I am using metal and metal2 at different roughness settings, but I
> always seem to get a pattern in the roughness of the material, I was
> wondering if any other rpict parameters affect the material behaviour.
> 
> My current suspects are:
> 
> -ad   Set the number of ambient divisions to N
> -as   Set  the number of ambient super-samples to N
> -ms	Set the medium sampling distance to sampdist
> 
> does anybody has some insight in this?
> Thanks,
> 
> Giovanni