POV-Ray : Newsgroups : povray.binaries.images : Antialiasing problems (3 images, 11k,15k,12k) : Re: Antialiasing problems (3 images, 11k,15k,12k) Server Time
12 Aug 2024 03:21:10 EDT (-0400)
  Re: Antialiasing problems (3 images, 11k,15k,12k)  
From: JFMILLER28
Date: 24 Jan 2004 15:44:56
Message: <4012d948$1@news.povray.org>
What this really means is that PovRay would benefit from having more 
Intelligent  handeling of >rgb 1 samples.  I've seen several people 
working on just such issues and I hope to see the results in... [Author 
was shot before he could mention a future version of POV in the news groups]

Slime wrote:

>>You could avoid
>>over-bright objects getting jagged edges by using more samples (the
>>anti-aliasing threshold would mean these extra samples only got used on
> 
> those
> 
>>high-contrast areas).
> 
> 
> If 1/9 of a pixel has the color rgb 10000, and the rest of the pixel has
> other colors between 0 and 1, and clipping happens after anti-aliasing, then
> the pixel is going to be 1/9 * 10000 + 8/9 * (something between 0 and 1),
> which works out to be well over 1, causing the entire pixel to be
> oversaturated. More samples just causes this calculation to be more
> accurate, but still well over 1. If this happens at every pixel along the
> edge of an object, it will look pixellated.
> 
>  - Slime
>  [ http://www.slimeland.com/ ]
> 
>


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