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I'm thinking about using POVray on a mosix or openmosix linux cluster.
I need to do just still images for architectural visualization and i fell in
love with POVray 3.5.
I am considering the possibility to start several POV processes, each
rendering a set of rows of the same pov file. Processes are intended to
migrate on the nodes of the cluster.
I'd like to implement the whole thing through a script in order to split the
work into rows and start the appropriate POV processes. The same script, or
another one, should collect the rendered images and stick them togheter to
obtain the final whole.
As i am quite a newbie both at pov and at linux programming, i have several
questions i hope someone can kindly help me to answer:
1) Will i be able to start several pov processes at the same time? should i
set up different INI files?
2) Will processes really migrate ?
3) Can there be problems using radiosity as the ones shown in PVMpov (which
i had considered to use, but it's not arrived at version 3.5 yet)?
4) as anyone (as i suspect) already written such sort of scripts? if yes, is
he/she willing to share the scripts (asking too much? uhu?)?
5) is it possible to stick togheter automagically the partial images? which
kind of file is it better to have as image file? which kind of problems may
i encounter?
Thank you in advance for any possible kind help.
francesco
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From: George Pantazopoulos
Subject: Re: pov on a mosix or openmosix cluster
Date: 13 Sep 2002 16:44:33
Message: <3d824e31$1@news.povray.org>
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Hi fransecso,
Theo Gottwald has already done what you speak of, his program is called
SmPOV, and heres the link: http://www.it-berater.org/smpov.htm
Any yes, there will be problems wtih radiosity if you simply divide the
image into tiles and render. I'm currently doing research on solving it or
reducing its impact.
George
"hv" <fra### [at] hermanitosverdes org> wrote in message
news:3d824b25$1@news.povray.org...
> I'm thinking about using POVray on a mosix or openmosix linux cluster.
> I need to do just still images for architectural visualization and i fell
in
> love with POVray 3.5.
> I am considering the possibility to start several POV processes, each
> rendering a set of rows of the same pov file. Processes are intended to
> migrate on the nodes of the cluster.
> I'd like to implement the whole thing through a script in order to split
the
> work into rows and start the appropriate POV processes. The same script,
or
> another one, should collect the rendered images and stick them togheter to
> obtain the final whole.
> As i am quite a newbie both at pov and at linux programming, i have
several
> questions i hope someone can kindly help me to answer:
> 1) Will i be able to start several pov processes at the same time? should
i
> set up different INI files?
> 2) Will processes really migrate ?
> 3) Can there be problems using radiosity as the ones shown in PVMpov
(which
> i had considered to use, but it's not arrived at version 3.5 yet)?
> 4) as anyone (as i suspect) already written such sort of scripts? if yes,
is
> he/she willing to share the scripts (asking too much? uhu?)?
> 5) is it possible to stick togheter automagically the partial images?
which
> kind of file is it better to have as image file? which kind of problems
may
> i encounter?
>
> Thank you in advance for any possible kind help.
> francesco
>
>
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Are you looking at saving the radiosity file from a pre-render and then
using that file on all rendering nodes?
Jim
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From: George Pantazopoulos
Subject: Re: pov on a mosix or openmosix cluster
Date: 13 Sep 2002 20:08:34
Message: <3d827e02$1@news.povray.org>
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Jim, youve read my mind! I'm experimenting with various settings to find the
quality/speed sweet spot.. Kari Kivisalo's radiosity artifact smoothing
method holds a lot of promise. Also later I will be looking into having
the slaves send updates of the octree to the master (via TCP communication).
George
"Jim Kress" <nos### [at] kressworkscom> wrote in message
news:3d82797c$1@news.povray.org...
> Are you looking at saving the radiosity file from a pre-render and then
> using that file on all rendering nodes?
>
> Jim
>
>
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Please me know if you get something that works. Thanks.
Jim
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From: George Pantazopoulos
Subject: Re: pov on a mosix or openmosix cluster
Date: 13 Sep 2002 23:41:53
Message: <3d82b001$1@news.povray.org>
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Will do. It will be a while yet before my distributed render program is
complete. I have completed 90% of the GUI (using C++ and MFC), and starting
the 'guts', but its taking time since I'm busy with school and also trying
to do it right. But in the meantime I'm experimenting with POVRay's
radiosity, so if I find something that works well I'll discuss it with the
newsgroup
George
"Jim Kress" <nos### [at] kressworkscom> wrote in message
news:3d82ad57$1@news.povray.org...
> Please me know if you get something that works. Thanks.
>
> Jim
>
>
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On Fri, 13 Sep 2002 20:14:07 -0400, "George Pantazopoulos"
<the### [at] attbicom*KILLSPAM*> wrote:
>Also later I will be looking into having
>the slaves send updates of the octree to the master (via TCP communication).
IIRC PVMegaPov does exactly that - sharing a common octree among all
slaves. Check out what Francois Dispot has to offer in his solution on
http://www.wozzeck.net/ . The sources are there if you want to have a
look.
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG e-mail : pet### [at] tagpovrayorg
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From: Christoph Hormann
Subject: Re: pov on a mosix or openmosix cluster
Date: 14 Sep 2002 04:30:26
Message: <3D82F3A0.5D8F36D@gmx.de>
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George Pantazopoulos wrote:
>
> Will do. It will be a while yet before my distributed render program is
> complete. I have completed 90% of the GUI (using C++ and MFC), and starting
> the 'guts', but its taking time since I'm busy with school and also trying
> to do it right. But in the meantime I'm experimenting with POVRay's
> radiosity, so if I find something that works well I'll discuss it with the
> newsgroup
As i have said before a distributed rendering system that does not run on
all common platforms (Windows, Unix, Mac) won't have widespread success
IMO. As you might have noticed the original posting of this thread was
asking for a solution for a unix system. Using scripts for this purpose
is probably a good idea since they will be useable on different system
without much trouble.
Solving the radiosity problem by copying the pretrace data to all
computers isn't a complete solution of the problem, most radiosity scenes
rely on the data gathered during the final trace as well. NTL
automatizing the pretrace and the afterwards distribution of data would
already be very helpful.
Christoph
--
POV-Ray tutorials, IsoWood include,
TransSkin and more: http://www.tu-bs.de/~y0013390/
Last updated 13 Aug. 2002 _____./\/^>_*_<^\/\.______
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