> I think that would depend on the comparitive niceness levels, though,
> wouldn't it?

	Of course.

> I still get some jerkiness in the
> graphics in the game, but it's not as pronounced.

	If you give the lowest priority to your POV-Ray job (+20), you should
get nearly the same effect as suspending it.  But not quite, as it would still
get maybe 1-2% of the resources on average.

> I've never observed POV-Ray automatically yielding processor to whatever
> other applications are running on the system or tuning it's
> niceness/priority level in the system.

	AFAIK only the OS - say the user on top of it - can do that in a Unix environment.
	(Honestly I never looked at this possibility.)

	- NC

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