POV-Ray : Newsgroups : povray.advanced-users : Problem with media and radiosity Server Time
26 Dec 2024 14:20:12 EST (-0500)
  Problem with media and radiosity (Message 1 to 7 of 7)  
From: TonyB
Subject: Problem with media and radiosity
Date: 28 Oct 1999 15:09:30
Message: <38189f6a@news.povray.org>
Hello. I believe I recall a message posted some time ago, but I can't seem
to find it, that deals with the problem I am about to describe. My problem
is that I have an atmospheric media (actually in a really big box) and
within that media, I have a media within a smaller container (a sphere). All
rendered nicely without radiosity, but now that there is radiosity I can see
the container sphere of the media within the media. What, if there is a fix,
can I do? TIA

PS: I've discovered this 16 hours into the rendering of my final YAHI...
please help me finish it!


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From: Chris Huff
Subject: Re: Problem with media and radiosity
Date: 28 Oct 1999 16:42:26
Message: <3818B5C5.150E897B@yahoo.com>
Why not use UVPov? I think the latest version has this problem fixed,
along with some other radiosity stuff.


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From: TonyB
Subject: Re: Problem with media and radiosity
Date: 28 Oct 1999 18:13:25
Message: <3818ca85@news.povray.org>
>Why not use UVPov? I think the latest version has this problem fixed,
>along with some other radiosity stuff.


So this is a bug? I didn't know that. Well, I guess I'll have to wait for
the SuperPatch to join with it to render. I was really hoping to put it out
soon. Oh, well. thank you.


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From: Nathan Kopp
Subject: Re: Problem with media and radiosity
Date: 28 Oct 1999 23:49:49
Message: <3819195d@news.povray.org>
TonyB <ben### [at] panamaphoenixnet> wrote ...
> >Why not use UVPov? I think the latest version has this problem fixed,
> >along with some other radiosity stuff.
>
>
> So this is a bug? I didn't know that. Well, I guess I'll have to wait for
> the SuperPatch to join with it to render. I was really hoping to put it
out
> soon. Oh, well. thank you.
>

Depends on your definition of a bug.  It's more of a limitation.  POV-Ray
3.1 only computes radiosity a trace depth 1, so if a ray already passed
through an object (clear media container) or reflected off of a mirror, the
trace depth will be greater than one and no radiosity will be calculated.
UVPov alpha 6 removes this limitation.

-Nathan


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From: TonyB
Subject: Re: Problem with media and radiosity
Date: 29 Oct 1999 06:56:12
Message: <38197d4c@news.povray.org>
>UVPov alpha 6 removes this limitation.


How?


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From: Nathan Kopp
Subject: Re: Problem with media and radiosity
Date: 30 Oct 1999 19:40:17
Message: <381b81e1@news.povray.org>
TonyB <ben### [at] panamaphoenixnet> wrote ...
> >UVPov alpha 6 removes this limitation.
>
>
> How?
>

What do you mean by "how?" ?

I changed the source so that this limitation no longer exists and
recompiled.  :-)  Now radiosity is computed even if the ray has passed
through a clear object or bounced off of a mirror.  A more complicated
explanation is reserved for povray.programming if you ask there.

-Nathan


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From: Nieminen Juha
Subject: Re: Problem with media and radiosity
Date: 31 Oct 1999 03:14:49
Message: <381bfa79@news.povray.org>
Nathan Kopp <Nat### [at] koppcom> wrote:
: Now radiosity is computed even if the ray has passed
: through a clear object or bounced off of a mirror.

  Unless the mirror has a high filter value... ;)

-- 
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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