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http://iki.fi/warp/pics/Radiosity_test2/
This time I tested the effects of the recursion level. Comments are
welcome.
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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Nieminen Mika wrote:
> http://iki.fi/warp/pics/Radiosity_test2/
>
> This time I tested the effects of the recursion level. Comments are
> welcome.
>
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
I was wondering if you could post / link to the source code for your scenes.
Any chance that I get to learn by looking at the scene code helps.
Mr. Art
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These tests really show how good radiosity can be when used properly. I wish
the source code would be included in the official pov distribution (or at
least on your page...), so that the many people who have trouble with
radiosity could use them as a starting point.
Gilles Tran
Nieminen Mika wrote:
> http://iki.fi/warp/pics/Radiosity_test2/
>
> This time I tested the effects of the recursion level. Comments are
> welcome.
>
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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This is an excellent demonstration. But while it proves the usefulness of
radiosity, it gives no information as to how this can be achieved. I suggest
posting at least the sources, and - if you feel like it - some form of tutorial.
Two suggestions:
1) Your comments in test 1 give the impression that one can go beyond recursion
level 2. As you probably know, this is not possible.
2) I test 3, I suggest covering the back of the reflector with a darker layer.
Otherwise its shadow looks weird.
Margus
Nieminen Mika wrote:
>
> http://iki.fi/warp/pics/Radiosity_test2/
>
> This time I tested the effects of the recursion level. Comments are
> welcome.
>
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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Arthur Flint wrote:
> Nieminen Mika wrote:
>
> > http://iki.fi/warp/pics/Radiosity_test2/
> >
> > This time I tested the effects of the recursion level. Comments are
> > welcome.
> >
> > --
> > main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> > ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
>
> I was wondering if you could post / link to the source code for your scenes.
>
> Any chance that I get to learn by looking at the scene code helps.
> Mr. Art
I took off on my own last night on a parlor rendering with radiosity and found
that if you set
#default{finish{ambient 0.0}} you get virtually no radiosity in the picture. The
scene that I was
working on only took 5 minutes. Increasing ambient to 0.05 is enough to bring in
radiosity affects
and increase render time to over 14 minutes.
So, lesson #1: Radiosity *needs* ambient values above zero.
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On 2 Jul 1999 01:12:28 -0400, Nieminen Mika <war### [at] cc tutfi> wrote:
> This time I tested the effects of the recursion level. Comments are
>welcome.
Very nice radiosity test images, Warp. Looks great! Well thought out,
showing the effects of radiosity on objects in shadowed areas of the scene,
too.
--
Alan
--------------------------------------------------------------------
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
news.povray.org - where POV-Ray enthusiasts around the world can get
together to exchange ideas, information, and experiences with others
--------------------------------------------------------------------
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Very convincing argument for using radiosity, the "3D" look is brought
out so well and done well too as Alan K. has said. In fact I wouldn't
have realized just how bland a non-radiosity image was if not for this.
Your Image 2.2 seemed to be lost from the web page so you might want to
check on that.
Alan Kong wrote:
>
> On 2 Jul 1999 01:12:28 -0400, Nieminen Mika <war### [at] cctutfi> wrote:
>
> > This time I tested the effects of the recursion level. Comments are
> >welcome.
>
> Very nice radiosity test images, Warp. Looks great! Well thought out,
> showing the effects of radiosity on objects in shadowed areas of the scene,
> too.
>
> --
> Alan
> --------------------------------------------------------------------
> http://www.povray.org - Home of the Persistence of Vision Ray Tracer
> news.povray.org - where POV-Ray enthusiasts around the world can get
> together to exchange ideas, information, and experiences with others
> --------------------------------------------------------------------
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/homepage.htm
mailto://inversez@aol.com?Subject=PoV-News
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>Your Image 2.2 seemed to be lost from the web page so you might want to
>check on that.
Try refreshing, sometimes multiple connections are dropped by the browser or
the server. (it worked just fine for me)
--
Lance.
---
For the latest 3D Studio MAX plug-ins, images and much more, go to:
The Zone - http://come.to/the.zone
For a totally different experience, visit my Chroma Key Website:
Colorblind - http://listen.to/colorblind
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It showed itself this time, yes. Had almost empty cache last time.
Anyway, no problem with it.
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Margus Ramst <mar### [at] peakeduee> wrote:
: 1) Your comments in test 1 give the impression that one can go beyond recursion
: level 2. As you probably know, this is not possible.
Oops. I forgot that...
: 2) I test 3, I suggest covering the back of the reflector with a darker layer.
: Otherwise its shadow looks weird.
Actually it's not its shadow. The reflector is actually emitting light to
every direction (I have global ambient light set to 4). Covering its backside
with a black layer is a good idea, though.
To everyone: I will probably write a text about how those images were
done and my experience about radiosity (which is not very extensive, though).
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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Nieminen Mika wrote:
> To everyone: I will probably write a text about how those images were
> done and my experience about radiosity (which is not very extensive, though).
You are being modest and your input on this subject would be greatly
appreciated.
--
Ken Tyler
mailto://tylereng@pacbell.net
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Ok, I added a link in the test page to a comments page.
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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I'll ditto that.
Ken wrote:
>
> You are being modest and your input on this subject would be greatly
> appreciated.
>
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Margus Ramst heeft geschreven in bericht <377CDC3E.3DF532DC@peak.edu.ee>...
>This is an excellent demonstration. .......
>Two suggestions:
>1) Your comments in test 1 give the impression that one can go beyond recursion
>level 2. As you probably know, this is not possible.
>2) .......
>
>Margus
Just did a test with recursion level above 2. It works. I went up to 50 with the
scene by Nieminen. I used the standard POV radiosity settings and only raised
the recursion level. In this scene there is no difference anymore with levels
above 5.
ingo
--
Met dank aan de muze met het glazen oog.
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From: Jay Raney
Subject: Re: Radiosity test 2 (Overexposed Radiosity)
Date: 17 Jul 1999 23:16:34
Message: <378FB031.57E2@usit.net>
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Your images look great warp!
You have great command of the radiosity feature?
Your comments mention the use of radiosity in outdoor settings causing
an overexposed looking scene. I have had the same trouble with similar
scenes. In my experiments, a scene viewed at a certain distance appeared
overexposed. But, with no other changes to the scene than moving the
camera, the radiosity effects become less overexposed as the camera
moves closer. The effects continue to diminish as the camera gets closer
almost disappearing altogether at some point.
Do any of the radiosity settings control the scale of this phenomena?
Does anyone understand why this happens?
Thanks
Jay Raney
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From: Lance Birch
Subject: Re: Radiosity test 2 (Overexposed Radiosity)
Date: 17 Jul 1999 23:27:32
Message: <379149a4@news.povray.org>
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>Does anyone understand why this happens?
Well, isn't it something to do with Radiosity not being scale independant?
I think Gilles mentioned this in one of his images that he had to scale the
whole scene down to fit it...
--
Lance.
---
For the latest 3D Studio MAX plug-ins, images and much more, go to:
The Zone - http://come.to/the.zone
For a totally different experience, visit my Chroma Key Website:
Colorblind - http://listen.to/colorblind
Jay Raney wrote in message <378### [at] usitnet>...
>Your images look great warp!
>You have great command of the radiosity feature?
>
>Your comments mention the use of radiosity in outdoor settings causing
>an overexposed looking scene. I have had the same trouble with similar
>scenes. In my experiments, a scene viewed at a certain distance appeared
>overexposed. But, with no other changes to the scene than moving the
>camera, the radiosity effects become less overexposed as the camera
>moves closer. The effects continue to diminish as the camera gets closer
>almost disappearing altogether at some point.
>Do any of the radiosity settings control the scale of this phenomena?
>Does anyone understand why this happens?
>
>Thanks
>Jay Raney
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Mostly the 'minimum_reuse' is scale related or rather scene
render-resolution dependant anyway. The documentation says this. Other
than that I would think only the 'distance_maximum' would be doing
anything with the scene scales, perhaps?
Lance Birch wrote:
>
> >Does anyone understand why this happens?
>
> Well, isn't it something to do with Radiosity not being scale independant?
>
> I think Gilles mentioned this in one of his images that he had to scale the
> whole scene down to fit it...
>
> --
> Lance.
>
> ---
> For the latest 3D Studio MAX plug-ins, images and much more, go to:
> The Zone - http://come.to/the.zone
> For a totally different experience, visit my Chroma Key Website:
> Colorblind - http://listen.to/colorblind
> Jay Raney wrote in message <378### [at] usitnet>...
> >Your images look great warp!
> >You have great command of the radiosity feature?
> >
> >Your comments mention the use of radiosity in outdoor settings causing
> >an overexposed looking scene. I have had the same trouble with similar
> >scenes. In my experiments, a scene viewed at a certain distance appeared
> >overexposed. But, with no other changes to the scene than moving the
> >camera, the radiosity effects become less overexposed as the camera
> >moves closer. The effects continue to diminish as the camera gets closer
> >almost disappearing altogether at some point.
> >Do any of the radiosity settings control the scale of this phenomena?
> >Does anyone understand why this happens?
> >
> >Thanks
> >Jay Raney
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/homepage.htm
mailto://inversez@aol.com?Subject=PoV-News
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