If you use LINUX, you can reduce the total rendertime
up to 50%-65% in a very simple way.

First split your animation in two(or more) segments
of Subset_Frames

i.e.
If you want to render an animation with 100 picture, create
two INI-Files.
The first ini-file controls the rendering of the pictures 1-50
the second .INI-File controls the rendering of the pictures 51-100
by setting subset_frames.

Then create a small shellscript with this two commandlines

 povray scene1_0.ini&
 povray scene1_1.ini

and start the script.

The "magic Point" is the "&"-sign at the end of the first
script line. This allow to run more than one instances
of povray *parallel*. Because the instance of povray runs
in a subshell in the background. And this parallel-rendering
brings a reduction of about 50%-65% of total rendertime.

Note!
The parallel-rendering does *NOT* increase the performance
in any way. It only uses CPU-power wich is normaly unused.

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