[Radiance-general] mirror specular reflections

[David Geisler-Moroder]

Hi,

something about the specular jittering:
The option -sj was replaced by -ss (specular sampling). The behaviour of -ss
is the same as it was for -sj if the parameter is less or equal to 1. If
it's n (greater than 1), n specular rays are generated instead of only 1.
(See also:
http://www.radiance-online.org/pipermail/radiance-dev/2010-November/001066.html
)

Best,
David

2011/5/11 Jack de Valpine <jedev at visarc.com>

>  Hi Chris,
>
> You may have to adjust the specular threshold / jittering options: -st and
> -sj. Also you may need to set -dr to something other than 0. What kind of
> effect are you expecting to see?
>
> -Jack
>
> --
> # Jack de Valpine
> # president
> #
> # visarc incorporated
> # http://www.visarc.com
> #
> # channeling technology for superior design and construction
>
>
> On 5/11/2011 3:16 PM, Chris Coulter wrote:
>
>  Good day list.
>
> I’m trying to test various materials for use in a light shelf. Currently,
> I’m testing a simple box (genbox wall room 10 10 10 –i) with south wall
> removed and the floor’s material set to a “mirror” or variations of “metal”.
> My gensky definition is: gensky 03 21 9 +s -a 39.7 -o 105.2 -m 105, which
> places direct sun on both the floor and west wall.
>
> When viewing the octree in rvu, there is no specular reflection from the
> floor with either mirror or metal (with 0 roughness). However, a metal with
> small roughness has some scattered reflection. I’ve tried changing
> parameters on many of the rpict options to try to solve the issue, but have
> had no luck.
>
> I’m currently running a HEAD distro from early January this year. About 15
> months ago, I was able to get specular reflections from a mirror (similar
> study) from the 4R0.
>
>
>
> Any help/advice would be greatly appreciated.
>
>
>
> *Chris M. Coulter, LC, IESNA, LEED AP*
> Associate
>
> Lighting Designer
>
> President, Detroit Section of the Illuminating Engineering Society
> ……………………………………………………
>
> *SmithGroup*
> 500 Griswold, Suite 1700
> Detroit, MI 48226
> *
> **t* 313.983.3600
>
>
>
>
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