P node units are 1/10th of an inch, always. This means, that if you're at X inches from the origin, the value is 10X.

You are therefore correct that using a factor of .1 scales that to an inch.

You are not correct to say the p-node works in PNU. You might have thought this by A) rounding PNU = 103.2 inches to 100 inches and B) getting the 10X in the wrong direction.

I have carefully measured it - with coefficients set to 1, the P node gives values of 10 * number of inches.

Because I live and die by the material room, my PDU is inches. See my signature.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)