xpitout works fine with more than one poly, I have that working fine on Nazareth with two polys. They're contiguous though, so no confirmation on seperate polys.
going through my scn line by line... my startglow instance says Instance=startglow { Planes=(4) Meshfile=startglow.gmt CollTarget=False HATTarget=False } Ive never seen the Planes=(4) before, and this SCN file was generated in rf2, any idea what it does??
Short answer: Should be, yes. Long answer: I'm fairly certain the white lines on ISI tracks are RealRoad materials as decal objects. I've tried that as well and went another way not because it wouldn't work but because I preferred a different look to them.