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I just stumbled across the fact that glows can be used as lighting in radiosity-only
scenes!
In the attatched image, there are no light sources.. just glows (approx 120 in each
'string').
It does take quite a long time to render (approx 1 hour for this image on a 1Ghz
Athlon).
NOTE: I have post-processed this image to enhance the contrast, as glows can make the
whole
image appear washed out if they're too bright.
Comments welcome.
All the best,
Andy Cocker
Post a reply to this message
Attachments:
Download 'RadiosityStripLightsRoom.jpg' (41 KB)
Preview of image 'RadiosityStripLightsRoom.jpg'
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What kind of glows? media or something that megapov offers?
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On Wed, 29 Jan 2003 03:09:42 +0100, Apache wrote:
> What kind of glows? media or something that megapov offers?
I think he means Megapov's artificial glow, and since it's only a fake
effect, it's something special that it even has an effect on radiosity.
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On Wed, 29 Jan 2003 03:09:42 +0100, "Apache" <apa### [at] yahoo com>
wrote:
> What kind of glows? media or something that megapov offers?
http://megapov.inetart.net/manual/effects.html#glow
ABX
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Andrew Cocker wrote:
>
> I just stumbled across the fact that glows can be used as lighting in radiosity-only
scenes!
> In the attatched image, there are no light sources.. just glows (approx 120 in each
'string').
> It does take quite a long time to render (approx 1 hour for this image on a 1Ghz
Athlon).
>
> NOTE: I have post-processed this image to enhance the contrast, as glows can make
the whole
> image appear washed out if they're too bright.
>
> Comments welcome.
>
Nice, i have made some experiments with glows and radiosity when they were
first introduced in megapov:
http://www-public.tu-bs.de:8080/~y0013390/pov/pict/glow_test_01.jpg
To avoid brightening the whole scene too much you should modify
'fade_power'.
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 31 Dec. 2002 _____./\/^>_*_<^\/\.______
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"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3E37A3DE.41FA9D50@gmx.de...
> To avoid brightening the whole scene too much you should modify
> 'fade_power'.
Thanks, I shall try that.
All the best,
Andy Cocker
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"Greg Edwards" <edw### [at] hotmailcomremovethis> wrote in message
news:53npt50sb44m$.12wljdgj77n2i.dlg@40tude.net...
> On Wed, 29 Jan 2003 03:09:42 +0100, Apache wrote:
>
> > What kind of glows? media or something that megapov offers?
>
> I think he means Megapov's artificial glow, and since it's only a fake
> effect, it's something special that it even has an effect on radiosity.
Yes, exactly. It was a surprise to me that it worked, but has great potential I think.
You
could easily simulate the 'over-exposed' glare from a window, for example.
All the best,
Andy Cocker
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"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3E37A3DE.41FA9D50@gmx.de...
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| Nice, i have made some experiments with glows and radiosity
| when they were first introduced in megapov:
Would it not be preferable to face the glows in the direction of the
"light", run the scene and save the radiosity files, and then run the
scene with the glows oriented towards the camera using the saved
radiosity?
-Shay
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"Shay" <sah### [at] simcopartscom> wrote in message news:3e37f000@news.povray.org...
> Would it not be preferable to face the glows in the direction of the
> "light", run the scene and save the radiosity files, and then run the
> scene with the glows oriented towards the camera using the saved
> radiosity?
I'm not sure what you mean by 'face the glows'. I don't think they work like that...
not like
textured discs if that's what you mean, but hey... I've been wrong before.
All the best,
Andy Cocker
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| I'm not sure what you mean by 'face the glows'. I don't think
| they work like that... not like textured discs if that's what
| you mean, but hey... I've been wrong before.
IIRC Megapov glows are textured spheres. An orient keyword in the next
glow patch might increase the quality of these types of scenes.
-Shay
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"Shay" <sah### [at] simcopartscom> wrote in message news:3e37f9dd$1@news.povray.org...
>
> IIRC Megapov glows are textured spheres. An orient keyword in the next
> glow patch might increase the quality of these types of scenes.
>
How do you orient a sphere?
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"Tom Melly" <tom### [at] tomandlucouk> wrote in message
news:3e3804fc$1@news.povray.org...
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| How do you orient a sphere?
I was thinking of orienting the pigment so that the brightest part of
the glow is on the line between the center of the sphere and the object
on which the radiosity "light" is meant to shine.
-Shay
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Shay wrote:
>
> I was thinking of orienting the pigment so that the brightest part of
> the glow is on the line between the center of the sphere and the object
> on which the radiosity "light" is meant to shine.
A glow is neither a textured sphere nor a disc and it has no orientation.
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 31 Dec. 2002 _____./\/^>_*_<^\/\.______
Post a reply to this message
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> I just stumbled across the fact that glows can be used as lighting in radiosity-only
scenes!
> In the attatched image, there are no light sources.. just glows (approx 120 in each
'string').
> It does take quite a long time to render (approx 1 hour for this image on a 1Ghz
Athlon).
>
> NOTE: I have post-processed this image to enhance the contrast, as glows can make
the whole
> image appear washed out if they're too bright.
>
> Comments welcome.
I hate to tell you this, but when I was playing with the Glows in Chris
Huff's MegaPOV+ a year or so ago (via a Moray plugin), there were a few
images posted here where glows were used as light sources for radiosity
renders.
Jamie.
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"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3E380A6D.9EEE5A4C@gmx.de...
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| A glow is neither a textured sphere nor a disc and it
| has no orientation.
Oh.
...well then, never mind.
-Shay
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"Jamie Davison" <jam### [at] ntlworldcom> wrote in message
> I hate to tell you this, but when I was playing with the Glows in Chris
> Huff's MegaPOV+ a year or so ago (via a Moray plugin), there were a few
> images posted here where glows were used as light sources for radiosity
> renders.
Really? Dunno how I missed them. Ah well...
Andy Cocker
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> > I hate to tell you this, but when I was playing with the Glows in Chris
> > Huff's MegaPOV+ a year or so ago (via a Moray plugin), there were a few
> > images posted here where glows were used as light sources for radiosity
> > renders.
>
> Really? Dunno how I missed them. Ah well...
September 2000. Well, I did say a year *or two* <grin>
http://news.povray.org/povray.binaries.images/12963/
Jamie.
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I can never get enough of glows. But don't forget they're buggy, in their
current implementation. I assume you've had your encounter with this? I did
one test and immediately got problems. I had nothing but glows in the scene
however, but those in front introduced wrong colors of those in the
background. I suppose this is related to the problem described by
Christopher James Huff, in which he says something about they mess up the
things behind them.
At least sometimes... :o/
Regards,
Hugo
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> > Really? Dunno how I missed them. Ah well...
>
> September 2000. Well, I did say a year *or two* <grin>
<pedantry>
Actually I said a year *or so*...
<sigh></pedantry>
Jamie.
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