POV-Ray : Newsgroups : povray.advanced-users : Focal-Blur VS Antialiasting method 2 : Re: Focal-Blur VS Antialiasting method 2 Server Time
29 Jul 2024 14:22:26 EDT (-0400)
  Re: Focal-Blur VS Antialiasting method 2  
From: Warp
Date: 8 Feb 2002 06:44:30
Message: <3c63ba1e@news.povray.org>
Tim Nikias <tim### [at] gmxde> wrote:
: But I do agree, too few samples get a grainy blur-look, at least
: when used with sharp contrasts.

  The main parameter affecting graininess is variance. AFAIK its default
value was lowered (from 1/128 to 1/10000) in order to get a much better result
with the defaults (previously it didn't matter how many samples you defined,
20 or 2000, you always got a grainy result due to the default value of
variance).
  Then, of course, the number of samples and the aperture are things that
affect this (the higher the aperture, the more samples you'll need).

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -


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