"Timothy R. Cook" wrote:
> 
> I still don't quite get why math (and hence POV) 3D coords use
> left-hand rule;

Because when you have the pencil in the right hand, only
the left hand is available for fancy manipulation !

Moreover, on computer, you need the right hand for the numeric pad.
(especially when typing pov-vector in script)

And last: Pov is not left-handed. It is half-ambidextrous* :
 default to left hand, but can work without problem with right hand.
 
* half-ambidextrous: just similar to half-duplex, can be both but not
at the same time.

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