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
Chris
The main options should be -ab (for at least 1 bounce) and -dr (for "direct
relay" which is what the mirror material creates). Have you incremented both
of these parameters?
Regards,
Thomas
···
On Wed, May 11, 2011 at 2:16 PM, Chris Coulter <[email protected] > 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
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
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
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 <[email protected]>
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
_______________________________________________
Radiance-general mailing [email protected]://www.radiance-online.org/mailman/listinfo/radiance-general
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general