POV-Ray : Newsgroups : povray.binaries.images : Hope for Pathological Radiosity Cases : Re: Hope for Pathological Radiosity Cases Server Time
2 Nov 2024 14:16:36 EDT (-0400)
  Re: Hope for Pathological Radiosity Cases  
From: Jim Holsenback
Date: 22 Aug 2010 07:52:56
Message: <4c710f98$1@news.povray.org>
On 08/21/2010 09:23 PM, clipka wrote:
> I don't want to brag, but I think this is a breakthrough for radiosity:
> 
> The attached images show a purely radiosity-lit scene, using
> pathologically small light emitters (three tiny spheres).

Looks good ... I've not had too much luck with purely radiosity lit
scenes in the past, so bragging rights are indeed yours!

> Image #2 shows how this can be improved (not surprisingly) by using a
> count of 6400 instead, after having replaced the built-in sample
> sequence with a 160,000-element halton sequence, of which a subset of
> 6400 was picked for each sample in a round-robin fashion. Splotches are
> almost gone, but there's a caveat: Render time increased to 7 minutes 20
> seconds.
> 
> Image #3 however shows even better quality with a rendering time of just
> 2 minutes 18 seconds. On the same machine. With virtually identical
> settings. So what's the deal here?
> 
> The basic idea is pretty simple: Trace fewer radiosity sample rays if
> they only hit non-important objects :-)

Be sure to keep us //all// up to date with your progress and I'll make
sure to integrate your findings into the documentation.

> Hey, I like this!

Concur!


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