"I am using poser native units"

Right so the numbers you should use are way smaller by a factor of 100 than the numbers I use, when it involves a distance (such as ray bias).

You cannot just copy my numbers, unless your number system is the same, inches, that mine is. What numbers did you use? I have no hope of clearing this up by just repeating my numbers. 

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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)