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Hi all,
After having taken my first little steps in setting up a few scenes, I tried
animating one of them. But when putting the animation together the light on
the floor is flickering.
Anyone got an idea how I can get rid of this effect. I don't use jitter,
actually there is no light in the scene at all.
Any ideas?
NumbC
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Attachments:
Download 'neontest.avi.dat' (658 KB)
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"NumbC" <ach### [at] gm-productions biz> schrieb im Newsbeitrag
news:web.4325aae060d8f7216fa503590@news.povray.org...
> Hi all,
>
> After having taken my first little steps in setting up a few scenes, I
> tried
> animating one of them. But when putting the animation together the light
> on
> the floor is flickering.
>
> Anyone got an idea how I can get rid of this effect. I don't use jitter,
> actually there is no light in the scene at all.
>
> Any ideas?
You should increase the 'count'-value in your radiosity settings. Radiosity
artifacts are much easier to see in animations than in still images, because
the sampling directions differ slightly from frame to frame which means that
you need higher sample counts for animations than for still images.
> NumbC
Thies
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> actually there is no light in the scene at all.
So it's radiosity, then? Then that's your problem: Radiosity uses a
random distribution of rays for lighting, which changes for every frame,
therby creating the flicker. You could try to use very high quality
settings for you radiosity, or fake the radiosity. Eli aka Apache did
something like that once, see
http://imp.org/forums/topic.asp?TOPIC_ID=289
Not sure if that works with you're scene, as you're relying on the
radiosity to emit those tubes light, right?
HTH,
Florian
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> Anyone got an idea how I can get rid of this effect. I don't use
> jitter, actually there is no light in the scene at all.
Don't. I think it's a pretty cool effect :->
--
,^--^. ,-----. Never meddle in the affairs of angry cats,
( + + )----- ---' for they are well-armed and quick to bite.
/ -- ) http://surreal.istic.org/ keyid 885b170d
|_,-|_/--,_|-\_| I'm not complaining; I'm just commenting negatively.
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I couldn't see it. What did you use to encode it, and which codec? Tried
Media Player Classic and Windows Media Player, both couldn't play it.
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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"Tim Nikias" <JUSTTHELOWERCASE:timISNOTnikias(at)gmx.netWARE> wrote:
> I couldn't see it. What did you use to encode it, and which codec? Tried
> Media Player Classic and Windows Media Player, both couldn't play it.
>
> --
> "Tim Nikias v2.0"
> Homepage: <http://www.nolights.de>
Hi Tim, I used the Intel Indeo Video V4.5 codec.
I am figuring out which is best to use and this one had for now the best
quality with an acceptable filesize. I want to show the effect clearly and
not have it worsened due to too much compression.
If you like it in another codec let me know and I can post it here or send
it to you. I currently use pjBmp2Avi to create them after reading about it
in one of the posts here. I am currently testing out various programs and
love to know someone who knows a .bmp or .tga or .png to .mov converter
BTW.
Again, tips on codecs are always welcome :)
nUMBc
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Thanks Thies Heidecke and Florian Brucker.
I'll try it right away and will post the result as soon as it's finished.
nUMBc
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I've just downloaded a codec pack and it runs fine now with Media Player
Classic.
Anyways, the flickering, like others have already said, is a by-product of
low radiosity settings. Still, you may encounter that even incredibly high
settings won't solve that problem (along with taking ages to render). If
you're really after an animation, I guess it would be better to use a whole
bunch of lightsources with fade_power 2 and a low fade_distance. Jitter
their positions slightly so that they don't all line up properly on the
torus-ring, and make sure the torus doesn't cast shadows, and you should be
fine. May still take long to render (depending on the amount of
lightsources), but it'd be less artifact-prone.
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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Hi Tim!
I just read some older threads about this topic and I found your answer
in the thread
http://news.povray.org/povray.animations/thread/%3C42247291%241%40news.povray.org%3E/
Wouldn't it be possible to use this technique with the current problem?
Greetings,
Florian
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> Wouldn't it be possible to use this technique with the current problem?
Not really. The technique described in that thread works for static scenes
where only the camera is animated. In this scene however, the actual
lightsource is generated via radiosity *and* is moving/animated. So
stitching all radiosity frames together would only result in a washed out
bright spot beneath the fluorescent lights, non-animated, which is what he's
after.
Regards,
Tim
--
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>
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