Grading Optimization (GO) has proved to be a great external application for manipulating surfaces in Civil 3D. It can be used to calculate near perfect cut / fill with a great degree of control - and even a decent level of smoothness! A version is now 'On the Radar' for Infraworks but nothing on Revit at this point.
How good would it be to be able to set a Filled Region as a grading limit, another as a Zone / Building Platform and then select a Toposolid and have GO produce one for us?
