From: "Geo" 

Obviously you don't raytrace. It's not an exclusive function, it's a
background operation that you let run while you do other things with the
machine. Think of it like seti, you can even have multiple machines working
on the same image.

Geo.

"Gary Britt"  wrote in message news:4450d950$1{at}w3....
> I agree with all of that, but if this guy is going to re-run this huge
> calculation, then he should be prudent and unplug the network connection,
> make sure he as a great UPS that will keep the thing going from the time
he
> leaves work till the time he gets back the next day, maybe use a macro
> program like "macro express" to periodically save the work as it goes
along.
>
> Prudence is good, because Murphy's law will always kick in on something
like
> this.
>
> Gary

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