I suspect that comparatively few 3D programs will render curves (lines and curves being, basically, infinitely thin). Could you take note of the thickness settigns for the hair and export as cylinder/cone segments? (bet that'd make for some large .OBJ files!). Just a thought - love the idea of an easy-to-use renderfarm for Poser 5 files (not tha tI mention this in every response to you, oh no!).