Hi Everyone,
I'm trying to render some images for a perceptual experiment. When I render with a sunlit sky (+s) I have no problems, but the variations in illumination are too great - I need more uniformity. But when I change the options to no sun (i.e. overcast "-c", or sunny without sun "-s") I get an error from rpict:
rpict: warning - no light sources found.
Some key parameters:-
gensky 01 01 13 +s -a 56.3400 -o 0 -m 0.00 -B 27.93 <-- substitute "+s" with "-c" or "-s"
skyfunc glow skyglow 0 0 4 1 1 1 0
skyglow source sky 0 0 4 0 0 1 180
rpict" -vf j:\radiancefiles\27_07_2011_13_10_893074_#0\view.vf -x 1800 -y 1800 -vh 15.30 -vv 15.30 -st 0.01 -ar 512 -aa 0.10 -ab 5 -lw 0.01000 -lr -10 j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.oct > j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.rpict
This is all running on mingw radiance on a windows PC. Anyone have any suggestions?
Thanks,
George
···
--
Department of Psychology, University of St Andrews
RM 1.05 (The white room).
Phone (01334) 462090
Hi George,
The "no light sources found" error is because there is no sun in your sky
model. The celestial hemisphere's sky glow is indeed just that, it's
modeled as a "glow" source in Radiance. Glows are only picked up in the
ambient calculation, so you need to have -ab set to at least 1. You have
-ab 5, so you should be good. As the message states, it's not an error,
merely a warning. You're good.
Rob Guglielmetti IESNA, LEED AP
Commercial Buildings Research Group
National Renewable Energy Laboratory
1617 Cole Blvd MS:RSF202
Golden, CO 80401
T. 303.275.4319
F. 303.630.2055
E. [email protected]
···
On 7/27/11 6:32 AM, "P George Lovell" <[email protected]> wrote:
Hi Everyone,
I'm trying to render some images for a perceptual experiment. When I
render with a sunlit sky (+s) I have no problems, but the variations in
illumination are too great - I need more uniformity. But when I change
the options to no sun (i.e. overcast "-c", or sunny without sun "-s") I
get an error from rpict:
rpict: warning - no light sources found.
Some key parameters:-
gensky 01 01 13 +s -a 56.3400 -o 0 -m 0.00 -B 27.93 <-- substitute "+s"
with "-c" or "-s"
skyfunc glow skyglow 0 0 4 1 1 1 0
skyglow source sky 0 0 4 0 0 1 180
rpict" -vf j:\radiancefiles\27_07_2011_13_10_893074_#0\view.vf -x 1800
-y 1800 -vh 15.30 -vv 15.30 -st 0.01 -ar 512 -aa 0.10 -ab 5 -lw 0.01000
-lr -10 j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.oct >
j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.rpict
This is all running on mingw radiance on a windows PC. Anyone have any
suggestions?
Thanks,
George
--
Department of Psychology, University of St Andrews
RM 1.05 (The white room).
Phone (01334) 462090
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
Thanks Rob! I've just been hitting control+c each time I got the warning! Doh.
Thanks so much!
George
···
On 27/07/2011 15:05, Guglielmetti, Robert wrote:
Hi George,
The "no light sources found" error is because there is no sun in your sky
model. The celestial hemisphere's sky glow is indeed just that, it's
modeled as a "glow" source in Radiance. Glows are only picked up in the
ambient calculation, so you need to have -ab set to at least 1. You have
-ab 5, so you should be good. As the message states, it's not an error,
merely a warning. You're good.
Rob Guglielmetti IESNA, LEED AP
Commercial Buildings Research Group
National Renewable Energy Laboratory
1617 Cole Blvd MS:RSF202
Golden, CO 80401
T. 303.275.4319
F. 303.630.2055
E. [email protected]
On 7/27/11 6:32 AM, "P George Lovell"<[email protected]> wrote:
Hi Everyone,
I'm trying to render some images for a perceptual experiment. When I
render with a sunlit sky (+s) I have no problems, but the variations in
illumination are too great - I need more uniformity. But when I change
the options to no sun (i.e. overcast "-c", or sunny without sun "-s") I
get an error from rpict:
rpict: warning - no light sources found.
Some key parameters:-
gensky 01 01 13 +s -a 56.3400 -o 0 -m 0.00 -B 27.93<-- substitute "+s"
with "-c" or "-s"
skyfunc glow skyglow 0 0 4 1 1 1 0
skyglow source sky 0 0 4 0 0 1 180
rpict" -vf j:\radiancefiles\27_07_2011_13_10_893074_#0\view.vf -x 1800
-y 1800 -vh 15.30 -vv 15.30 -st 0.01 -ar 512 -aa 0.10 -ab 5 -lw 0.01000
-lr -10 j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.oct>
j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.rpict
This is all running on mingw radiance on a windows PC. Anyone have any
suggestions?
Thanks,
George
--
Department of Psychology, University of St Andrews
RM 1.05 (The white room).
Phone (01334) 462090
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
--
Department of Psychology, University of St Andrews
RM 1.05 (The white room).
Phone (01334) 462090
If I had a nickel for every "doh moment" using Radiance, I wouldn't have
to do this crap anymore. =8-)
Have fun!
-Rob
···
On 7/27/11 8:40 AM, "P George Lovell" <[email protected]> wrote:
Thanks Rob! I've just been hitting control+c each time I got the
warning! Doh.
Thanks so much!
George
On 27/07/2011 15:05, Guglielmetti, Robert wrote:
Hi George,
The "no light sources found" error is because there is no sun in your
sky
model. The celestial hemisphere's sky glow is indeed just that, it's
modeled as a "glow" source in Radiance. Glows are only picked up in the
ambient calculation, so you need to have -ab set to at least 1. You have
-ab 5, so you should be good. As the message states, it's not an error,
merely a warning. You're good.
Rob Guglielmetti IESNA, LEED AP
Commercial Buildings Research Group
National Renewable Energy Laboratory
1617 Cole Blvd MS:RSF202
Golden, CO 80401
T. 303.275.4319
F. 303.630.2055
E. [email protected]
On 7/27/11 6:32 AM, "P George Lovell"<[email protected]> >>wrote:
Hi Everyone,
I'm trying to render some images for a perceptual experiment. When I
render with a sunlit sky (+s) I have no problems, but the variations in
illumination are too great - I need more uniformity. But when I change
the options to no sun (i.e. overcast "-c", or sunny without sun "-s") I
get an error from rpict:
rpict: warning - no light sources found.
Some key parameters:-
gensky 01 01 13 +s -a 56.3400 -o 0 -m 0.00 -B 27.93<-- substitute "+s"
with "-c" or "-s"
skyfunc glow skyglow 0 0 4 1 1 1 0
skyglow source sky 0 0 4 0 0 1 180
rpict" -vf j:\radiancefiles\27_07_2011_13_10_893074_#0\view.vf -x 1800
-y 1800 -vh 15.30 -vv 15.30 -st 0.01 -ar 512 -aa 0.10 -ab 5 -lw 0.01000
-lr -10 j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.oct>
j:\radiancefiles\27_07_2011_13_10_893074_#0\wholeScene.rpict
This is all running on mingw radiance on a windows PC. Anyone have any
suggestions?
Thanks,
George
--
Department of Psychology, University of St Andrews
RM 1.05 (The white room).
Phone (01334) 462090
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
--
Department of Psychology, University of St Andrews
RM 1.05 (The white room).
Phone (01334) 462090
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
By the way... is the warning not somehow obsolete and misleading in times, where a lot of tools of the Radiance toolkit rely on scenes including no light-type objects? I think I would prefer to have the warning removed, as it may be more irritating then helpful these days. If there was a simple way to check whether a scene contains neither light nor glow object, that would be useful - but probably not that easy to detect.
Cheers, Lars.
At the 2006 workshop Axel suggested that the Radiance community create a logo for Radiance. He joked that without a proper logo our t-shirts would look like this:
http://gaia.lbl.gov/people/andy/public/LogoforTshirt.jpg
That warning is still the closest thing we have to a logo.
Andy
···
On Jul 27, 2011, at 7:57 AM, Lars O. Grobe wrote:
By the way... is the warning not somehow obsolete and misleading in times, where a lot of tools of the Radiance toolkit rely on scenes including no light-type objects? I think I would prefer to have the warning removed, as it may be more irritating then helpful these days. If there was a simple way to check whether a scene contains neither light nor glow object, that would be useful - but probably not that easy to detect.
Cheers, Lars.
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
I LOVE IT!!
Rob Guglielmetti IESNA, LEED AP
Commercial Buildings Research Group
National Renewable Energy Laboratory
1617 Cole Blvd MS:RSF202
Golden, CO 80401
T. 303.275.4319
F. 303.630.2055
E. [email protected]
···
On 7/27/11 11:15 AM, "Andy McNeil" <[email protected]> wrote:
At the 2006 workshop Axel suggested that the Radiance community create a
logo for Radiance. He joked that without a proper logo our t-shirts
would look like this:
http://gaia.lbl.gov/people/andy/public/LogoforTshirt.jpg
That warning is still the closest thing we have to a logo.
Andy
On Jul 27, 2011, at 7:57 AM, Lars O. Grobe wrote:
By the way... is the warning not somehow obsolete and misleading in
times, where a lot of tools of the Radiance toolkit rely on scenes
including no light-type objects? I think I would prefer to have the
warning removed, as it may be more irritating then helpful these days.
If there was a simple way to check whether a scene contains neither
light nor glow object, that would be useful - but probably not that easy
to detect.
Cheers, Lars.
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
Yeah, the shirt is great!
Maybe we should define a dress code for this year's workshop 
···
Am 27.07.2011 19:37, schrieb Guglielmetti, Robert:
I LOVE IT!!
Rob Guglielmetti IESNA, LEED AP
Commercial Buildings Research Group
National Renewable Energy Laboratory
1617 Cole Blvd MS:RSF202
Golden, CO 80401
T. 303.275.4319
F. 303.630.2055
E. [email protected]
On 7/27/11 11:15 AM, "Andy McNeil"<[email protected]> wrote:
At the 2006 workshop Axel suggested that the Radiance community create a
logo for Radiance. He joked that without a proper logo our t-shirts
would look like this:
http://gaia.lbl.gov/people/andy/public/LogoforTshirt.jpg
That warning is still the closest thing we have to a logo.
Andy
On Jul 27, 2011, at 7:57 AM, Lars O. Grobe wrote:
By the way... is the warning not somehow obsolete and misleading in
times, where a lot of tools of the Radiance toolkit rely on scenes
including no light-type objects? I think I would prefer to have the
warning removed, as it may be more irritating then helpful these days.
If there was a simple way to check whether a scene contains neither
light nor glow object, that would be useful - but probably not that easy
to detect.
Cheers, Lars.
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
The warning should be updated -- I have a suggestion:
"Warning - no light sources found. Wait a mo', you're NOT doing a daylight factor calculation, ARE YOU? I mean, really, in this day and age. Or could it be the clear sky option in LEED? Think about it: a clear sky WITHOUT sun - a physically impossible illumination condition in nature! Isn't that just a bit weird? No, no, don't hit Ctrl-C, I haven't finished..."
Best
John Mardaljevic
Reader in Daylight Modelling
Institute of Energy and Sustainable Development
De Montfort University
The Gateway, Leicester, LE1 9BH, UK
Tel: +44 (0) 116 257 7972
[email protected]
http://www.iesd.dmu.ac.uk/~jm
John, that is quality. Only suitable for xxl t shirts.
Regards
Andrew
Cundall Light4
0161 200 1235
07899 907 978
···
-----Original Message-----
From: John Mardaljevic
Sent: 28 July 2011 14:06
To: [email protected]
Subject: Re: [Radiance-general] Can't get gensky to work without sun...
The warning should be updated -- I have a suggestion:
"Warning - no light sources found. Wait a mo', you're NOT doing a daylight factor calculation, ARE YOU? I mean, really, in this day and age. Or could it be the clear sky option in LEED? Think about it: a clear sky WITHOUT sun - a physically impossible illumination condition in nature! Isn't that just a bit weird? No, no, don't hit Ctrl-C, I haven't finished..."
Best
John Mardaljevic
Reader in Daylight Modelling
Institute of Energy and Sustainable Development
De Montfort University
The Gateway, Leicester, LE1 9BH, UK
Tel: +44 (0) 116 257 7972
[email protected]
http://www.iesd.dmu.ac.uk/~jm
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
Cundall have been awarded the Sustainable Consultant of the year award at the 2010 Building Sustainability Awards
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</pre>
The warning should be updated -- I have a suggestion:
"Warning - no light sources found. Wait a mo', you're NOT doing a
daylight factor calculation, ARE YOU? I mean, really, in this day and
age. Or could it be the clear sky option in LEED? Think about it: a
clear sky WITHOUT sun - a physically impossible illumination
condition in nature! Isn't that just a bit weird? No, no, don't hit
Ctrl-C, I haven't finished..."
Ok, John, you gave me an idea, why not have all warning message strings
replaced by some http-requests piping this mailing list's archives to
STDERR? It is not wearable though 
Cheers, Lars.
Since we're having a particularly cheeky couple of days with this thread, I
thought I'd share. John, your verbose warning message reminded me of a post
I wrote a few years ago about "green" email signatures:
http://www.rumblestrip.org/2007/03/29/green-signature-drafts/
- Rob
···
On Thu, Jul 28, 2011 at 7:06 AM, John Mardaljevic <[email protected]> wrote:
The warning should be updated -- I have a suggestion:
"Warning - no light sources found. Wait a mo', you're NOT doing a daylight
factor calculation, ARE YOU? I mean, really, in this day and age. Or could
it be the clear sky option in LEED? Think about it: a clear sky WITHOUT sun
- a physically impossible illumination condition in nature! Isn't that just
a bit weird? No, no, don't hit Ctrl-C, I haven't finished..."
Best
John Mardaljevic
Reader in Daylight Modelling
Institute of Energy and Sustainable Development
De Montfort University
The Gateway, Leicester, LE1 9BH, UK
Tel: +44 (0) 116 257 7972
[email protected]
http://www.iesd.dmu.ac.uk/~jm
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general
No one ever heard of a solar eclipse around here?
Btw.: Since I'm an aesthetic minimalist, my preferred choice
for a t-shirt print would be:
-w
-schorsch
···
On Thu, 28 Jul 2011, John Mardaljevic wrote:
Think about it: a clear sky WITHOUT sun
- a physically impossible illumination condition in nature! Isn't that just
a bit weird?
--
Georg Mischler -- simulations developer -- schorsch at schorsch com
+schorsch.com+ -- lighting design tools -- http://www.schorsch.com/
Wouldn't be too difficult to squelch this warning when -ab > 0 and some glow object is present.
But then what will we do for entertainment?
-Greg
···
From: "Lars O. Grobe" <[email protected]>
Date: July 27, 2011 7:57:45 AM PDT
By the way... is the warning not somehow obsolete and misleading in times, where a lot of tools of the Radiance toolkit rely on scenes including no light-type objects? I think I would prefer to have the warning removed, as it may be more irritating then helpful these days. If there was a simple way to check whether a scene contains neither light nor glow object, that would be useful - but probably not that easy to detect.
Cheers, Lars.
If I'm not wrong, does the "-w" option means "hey, Radiance, I know what I'm
doing, so just SHUT UP! ... @^*XXX&?^!(@&*XX?X@!_@...*&%?!!.. )
Hehe, - Ji
···
On Thu, Jul 28, 2011 at 11:07 PM, Georg Mischler <[email protected]>wrote:
On Thu, 28 Jul 2011, John Mardaljevic wrote:
Think about it: a clear sky WITHOUT sun
- a physically impossible illumination condition in nature! Isn't that
just
a bit weird?
No one ever heard of a solar eclipse around here?
Btw.: Since I'm an aesthetic minimalist, my preferred choice
for a t-shirt print would be:
-w
-schorsch
--
Georg Mischler -- simulations developer -- schorsch at schorsch com
+schorsch.com+ -- lighting design tools -- http://www.schorsch.com/
______________________________**_________________
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Radiance-general@radiance-**online.org<[email protected]>
http://www.radiance-online.**org/mailman/listinfo/radiance-**general<http://www.radiance-online.org/mailman/listinfo/radiance-general>
