POV-Ray : Newsgroups : povray.beta-test : RC5 photons and render time : Re: RC5 photons and render time Server Time
29 Jul 2024 10:19:52 EDT (-0400)
  Re: RC5 photons and render time  
From: Dave Dunn
Date: 27 May 2002 00:11:16
Message: <3CF1B1C3.4C8010FF@aol.com>
Mike Hough wrote:

> It was suggested to me that I do a comparison using the example scene
> "optics.pov" to show the difference in render time between MegaPOV 0.7 and
> POV-Ray 3.5 RC5.  The only change to the scene was to replace the keyword
> "collect off" to "ignore_photons".  MegaPOV appears to render the scene
> about 7 times faster.  I'll post the images in the binaries group.  To me
> there doesn't seem to be much difference between the two.

I can confirm a similar discrepancy using the "photons example" file in the
3.5 Insert Menu. The only change to the file was to convert fresnel reflection
to MegaPOV syntax. Stats below:

MegaPOV 0.7  1578 pps  --  3min 15sec  -- memory 2078333
3.5 RC5             190pps   -- 26min 56sec  -- memoy 1793608

Resolution was 640x480 aa.3 on a P3 600 running Windows 2000, with 96M of RAM.
Speed difference was over 8 times slower for 3.5 RC5.


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