POV-Ray : Newsgroups : povray.general : povray vs uberpov am3 : Re: povray vs uberpov am3 Server Time: 24 Oct 2020 20:40:28 GMT
  Re: povray vs uberpov am3  
From: Ash Holsenback
Date: 15 Sep 2020 14:25:53
On 9/14/20 12:35 PM, William F Pokorny wrote:
> On 9/14/20 4:42 AM, Ton wrote:
>> Hello everybody,
>>
>> when I use am3 (stochastic anti-aliasing) in the latest version 
>> (10064738), it
>> is about 5 times slower then in uberpov:
>>
>> Persistence of Vision(tm) Ray Tracer Version 
>> 3.8.0-x.10064738.unofficial (g++ 7
>> @ x86_64-pc-linux-gnu)
>> Render Time:
>>    Photon Time:      No photons
>>    Radiosity Time:   No radiosity
>>    Trace Time:       0 hours 20 minutes  4 seconds (1204.944 seconds)
>>                using 4 thread(s) with 4542.093 CPU-seconds total
>>
>> UberPOV Raytracer Version 1.37.1.0-beta.10 (g++ 7 @ x86_64-pc-linux-gnu)
>> Render Time:
>>    Photon Time:      No photons
>>    Radiosity Time:   No radiosity
>>    Trace Time:       0 hours  3 minutes 52 seconds (232.382 seconds)
>>                using 4 thread(s) with 907.615 CPU-seconds total
>>
>> Command line is:
>> povray +d +p +q9 +am3 +a0.1 +ac0.9 +r6 AntiAliasingTest.pov
>> uberpov +d +p +q9 +am3 +a0.1 +ac0.9 +r6 AntiAliasingTest.pov
>>
>> Does anybody have a clue why povray is so much slower?
>>
>> Cheers
>> Ton
>>
> 
> Are the results more or less similar?
> 
> I know uber differs in code structure. I've myself run across an am3 
> case in v3.8 where the run time - on a solid color change - increased 
> 100x. Not yet dug into the latter. Beyond that, no idea.
> 
> If the AntiAliasingTest.pov scene is relatively small and self 
> contained, could you post a copy? I'll at least put it in my issues 
> directory, though who knows when I might take a look at it.
> 
> Bill P.

i've been using the am3 anti-aliasing in POV-Ray 3.8.0-alpha.10064268 in 
conjunction with area lights... i'm able to use adaptive 0 then use am3 
to cleanup edges etc... so i'd appreciate you finding /some/ time to see 
if some speed gains can be found


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