POV-Ray : Newsgroups : povray.newusers : Strange shadows under figure : Re: Strange shadows under figure Server Time
21 Jul 2024 12:55:03 EDT (-0400)
  Re: Strange shadows under figure  
From: William F Pokorny
Date: 22 Jun 2016 09:34:28
Message: <576a93e4$1@news.povray.org>
On 06/22/2016 07:36 AM, William F Pokorny wrote:
> I'd guess the first issue is the area_light is very near your object for
> the vectors you have specified(1).

Wondering if maybe the near area light (like 36 discrete lights being 
placed so near) would still more or less work out OK because of jitter. 
In other words, now wondering if the jitter is in the area light to 
light space and not the pixel AA space(1).

It is! 15+ years using POV-Ray and I'm still getting my head around 
fundamental things...

The result in my local test was still noisy so suppose it might still 
affect radiosity. Increasing the area light count might help if true.

Bill P.

(1) For what it is worth, the following from the Making animation 
section of the documentation is what confused me about how jitter really 
works. "Jitter is a very small amount of random ray perturbation 
designed to diffuse tiny aliasing errors...". The jitter being in the 
area light to light space I believe means the ray to light perturbation 
can be any magnitude from really tiny to really large.

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