Okay, here's an update: I was wrong on that Poser Pro 32 bit output needing "dumbed down" to 16 bits...it actually needs smartened up to 64 bit. (I was thinking in terms of bits per channel)

The terms can get confusing (obviously confusing me for "a bit" there), but now I know with certainty that the file output by Poser Pro is 32 bits per pixel, whereas my requirement is 64 bits per pixel. Thus, no new hope in Poser Pro for me, can't do anything (for my requirement) that I couldn't do in Poser 7.