Grad a demo license of 3DReshaper .. let me know how you go. Pretty sure it can ingest OBJ .. can certainly put it out. Not cheap mind you. How big are the tiles you are trying to edit? Edit smaller/less tiles? 3DReshaper has lots of other cool things too .. might be handy - eg ground extract .. reporting .. stockpile volumes .. depending on whatever else you are doing.
↧