Quote - then else is wrong.

I think it's probably the fact that Lux is more precise than conventional renderers when computing refraction. In Poser, everything's pretty fuzzy, so it won't really matter that much - or so I suppose - whether you have a perfectly smooth curved surface or an approximation by tiny polygons. In Lux, it does.

As I said, the alternative would be to use a mathematically smooth surface, which Lux apparently supports, but Poser and LuxPose don't.

-- I'm not mad at you, just Westphalian.