POV-Ray : Newsgroups : povray.general : How to generate radiosity data and then quit? Server Time
4 Nov 2024 19:14:53 EST (-0500)
  How to generate radiosity data and then quit? (Message 1 to 4 of 4)  
From: jhu
Subject: How to generate radiosity data and then quit?
Date: 23 Mar 2010 21:25:01
Message: <web.4ba968f0a83ab146ab8b233e0@news.povray.org>
The power went out while my computer was in the middle of a long render. All is
not lost, since I've been meaning to try out rendering on multiple computers.
Eventually I'd like this all to be automated. So how do I get Pov to exit once
it finishes generating radiosity data?


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From: clipka
Subject: Re: How to generate radiosity data and then quit?
Date: 23 Mar 2010 22:10:08
Message: <4ba97480$1@news.povray.org>
jhu schrieb:
> The power went out while my computer was in the middle of a long render. All is
> not lost, since I've been meaning to try out rendering on multiple computers.
> Eventually I'd like this all to be automated. So how do I get Pov to exit once
> it finishes generating radiosity data?

No way - POV-Ray won't let you go without a main render. You can use a 
reduced resolution though, running this pre-render with "always_sample 
on", effectively using it as just another pretrace pass.


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From: jhu
Subject: Re: How to generate radiosity data and then quit?
Date: 23 Mar 2010 23:15:01
Message: <web.4ba9836ba74cfb2dab8b233e0@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:

> No way - POV-Ray won't let you go without a main render. You can use a
> reduced resolution though, running this pre-render with "always_sample
> on", effectively using it as just another pretrace pass.

Does focal blur affect the radiosity data? My guess would be no. And how much
smaller is an acceptable resolution to generate radiosity data for the main
render?


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From: clipka
Subject: Re: How to generate radiosity data and then quit?
Date: 24 Mar 2010 08:44:23
Message: <4baa0927$1@news.povray.org>
jhu schrieb:

> Does focal blur affect the radiosity data? My guess would be no. And how much
> smaller is an acceptable resolution to generate radiosity data for the main
> render?

In some sense focal blur does affect radiosity data: You potentially get 
a better sample coverage, because more rays are shot - and from slightly 
different origins. So as a result, this may force POV-Ray to take 
samples at places that would be missed otherwise. Other than that, there 
is no effect on radiosity.

Thinking of the "main pre-render" as an additional pretrace step, I'd 
suggest a resolution of (roughly) 2/pretrace_end in whatever dimension 
is larger; the other dimension should be chosen according to the 
intended aspect ratio of the main render. This way, you indeed mimick an 
additional pretrace step (so you may choose a larger pretrace_end in the 
first place).


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