Moi flipping polygons on export.

 From:  Michael Gibson
4531.6 In reply to 4531.1 
Hi Andy and yes like PaQ mentions if you're transferring into Modo I'd recommend LWO format and not OBJ - the data in LWO is the closest to how Modo structures things internally itself and so its LWO importer doesn't really mess around with stuff. Modo's OBJ importer has improved in recent releases but still kind of has a ways to go with handling n-gons.

- Michael