POV-Ray : Newsgroups : povray.beta-test : v3.8+ crackle instability (facets?) with >1 uses per thread. : Re: v3.8+ crackle instability (facets?) with >1 uses per thread. Server Time
18 Jul 2024 08:29:21 EDT (-0400)
  Re: v3.8+ crackle instability (facets?) with >1 uses per thread.  
From: William F Pokorny
Date: 10 Jun 2024 07:51:26
Message: <6666e8be$1@news.povray.org>
On 6/9/24 00:21, William F Pokorny wrote:
> Ah, and what about facets.

FWIW. The caching mechanism is simpler (older) for facets. As with 
crackle I experimented some with forcing 100% misses. The slow down in 
the heavy AA case is +195% as opposed to the +335% seen with crackle. 
The difference likely comes down to the overhead for the simpler facets 
cache being smaller. The facets cache comes close to what I wanted to 
try with the crackle cache.

Going to let ideas to rattle around in my head for a while as to what to 
do. ( 1. Limit use to one crackle and one facets use in any given scene. 
2. A cache per crackle/facets use / per thread. 3. ...)

Bill P.


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