Or how about from Rhino to ZBrush and back again, for automatic fillets on something that would be very hard to do, otherwise. Rhino file on the top, the bottom was exported from Rhino, opened in ZBrush, exported back out as a quad mesh and converted to NURBS with T-Splines. This sort of thing isn’t on everyone’s need to do list, but it’s on mine quite often.
