POV-Ray : Newsgroups : povray.documentation.inbuilt : Anti-aliasing mode 3 : Re: Anti-aliasing mode 3 Server Time
3 Dec 2021 10:56:23 EST (-0500)
  Re: Anti-aliasing mode 3  
From: Jim Holsenback
Date: 23 Sep 2018 07:49:09
Message: <5ba77db5$1@news.povray.org>
On 9/23/18 7:36 AM, Jim Holsenback wrote:
>> ----------------------------------------------------------
>> Another way to reduce anti-aliasing artifacts is to introduce noise into
>> the sampling process. This is called jittering and works because the
>> human visual system is much more forgiving to noise than it is to
>> regular patterns, and is inherent in anti-aliasing mode 3. When using
>> one of the other methods, the location of the super-samples is also
>> jittered or wiggled a tiny amount jittering by default, but may be
>> turned off with the Jitter=off option or -J option, or the amount of
>> jittering can be set with the Jitter_Amount=n.n option. When using
>> switches the jitter scale may be specified after the +Jn.n option. For
>> example +J0.5 uses half the normal jitter. The default amount of 1.0 is
>> the maximum jitter which will insure that all super-samples remain
>> inside the original pixel.
>> -----------------------------------------------------------

one more thing i just thought of...so is -j is useless if using +am3. 
does it throw a warning if the user specifies? i couldn't check because 
i'm in the middle of my variation of RSOCP...GSOPP (glowing spheres on 
pavement plane) beauty run

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