
The terrain is called a “Toposurface” in Revit, and an Autodesk Revit “Building Pad” will automatically cut through a toposurface. Usually this cutting boundary follows an outline of your building’s basement walls or follows along a retaining wall.
The building pad is a toposurface hosted element and can be added only to an existing topographical surface. This Building Pad tool will be activated in the Model Site panel only if there is an...