The view on the top image makes me think you look at co-incident polygons, and the preview render engine having difficulties to make out which of the two is in front.

I do not know the exact implementation of Bullet in Poser but I would not be surprised if it involves adding an extra 'Bullet friendly' copy of geometry to do the computing on. 

How did you bring this G3 figure into Poser? I recall DSON also did make extra geometry.

This may cause a conflict.