POV-Ray : Newsgroups : povray.binaries.images : Alum : Re: Alum Server Time
6 Oct 2022 23:20:01 EDT (-0400)
  Re: Alum  
From: William F Pokorny
Date: 21 Sep 2021 11:42:44
Message: <6149fd74$1@news.povray.org>
On 9/19/21 7:09 PM, Samuel B. wrote:
> Here's the source code (minus luminous bloom):

Cool. Thank you for posting the code.

I used your scene to do a little crude bench-marking of my povr branch.

To create the attached image, I changed:

#declare RGBSun = srgb 1.3*<2, 1.99, 1.97>;

to

#declare RGBSun = srgb <1, 0.99, 0.97>;
#declare RGBSun = 2.7*RGBSun;

because my povr branch now doesn't allow srgb channel specifications 
outside the 0-1 range.

Plus, I changed the crystal's normal to the povr branch's quilted normal 
- but still scaled very small - and aiming for a blurred reflection.

Given you are using camera blur to over sample, I wanted to see how 
povr's big jitter would compare time wise. The big jitter approach took 
2.4x longer to render at +a0.0 +am2 +r4 +j62.111 than your blur samples 
method of oversampling. I can tell from the render statistics I was too 
aggressive at r4 - as I shot roughly 2.7x more rays. I'd say the mothods 
are in the ballpark performance wise, with other differences in control 
and result which might matter or not. FWIW.

Bill P.


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