On 10/19/20 6:29 PM, Kenneth wrote:
> "Kenneth" <kdw### [at] gmailcom> wrote:
> 
>>
>> I forgot to mention that Stochastic_Seed (or +SS) is not accepted either, in
>> either location.
>>
>> It seems that v3.8 in Windows is not recognizing those terms. :-(
> 
> I did an animation test anyway, by simply leaving out the two terms.
> 
> my .ini file:
> [1280x960, AA special]
> Width=1280
> Height=960
> Antialias=On
> Sampling_Method=3
> Antialias_Threshold=0.05
> 
> Nothing moves in my scene, or the camera; just static animation frames. I took
> two consecutive frames into Photoshop, 'differenced' them, and exaggerated any
> possible defects. And I don't see ANY difference between the two images-- no
> out-of-place pixles at all. :-) Perhaps Stochastic_Seed is already 'on' by
> default in the Windows version(?). In any case, the renders are beautifully
> antialiased, and consistent.
> 
> Perhaps a *moving* camera might show something-- but any am3 difference from
> frame to frame would be hard to verify by itself, since everything else is
> slightly changing as well.
> 

My only guess is you have a version which doesn't completely support 
method 3 AA. Did you review the render messages back to the screen? In
the unix based versions we see something like:


   Antialiasing.........On  (Method 2, Threshold 0.100, Depth 3,
                             Jitter 1.00, Gamma 2.50)

Asking because in regular POV-Ray specifying a mode greater than really 
supported defaults to the largest really supported. Are you seeing 
"Method 3" in the text output?

---
... Maybe my thinking about am3 being better for animations due no 
jitter is bogus. Maybe even some of our thinking and documentation about 
jitter frame to frame. Seems like I used to get render to render 
differences with jitter on - it's why I forever have turned it off when 
I do image to image compares.

Trying now I - like you - cannot get a difference... There is something 
I don't understand about jitter and AA! Is it today (v3.7+) really 
random render to render? Are we getting some pre-seeded psuedo random 
jitter?

Busy the next couple of days, but need to look more at this.

Bill P.

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