At least one probable mistake in the sketch above: L don't think you can use a P node for the camera position - I think it used the node where you can set a colour by specifying r,g,b values and setting r=cameraX, g=cameraY, and b=cameraZ. 'User Defined' node rings a bell.

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident. And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU or something else.
*soon only to be available in two flavours -  DAZ and Renderosity