Auto_Fit? What the heck is that?

jerr3d, which service release of P5 are you using? Is this the Mac version? My PC version doesn't have that option for 2D texture nodes.

Incidentally, you're having that problem with your render because you're using one of Poser's double-sided squares.

Attach your texture node to the Displacement channel, with a value of 0.001, and enable displacement in your Render Options. That should solve the problem.

Or use a single-sided square, instead.