Create topographic elements as solid geometry.
Toposolid elements represent the topography and site conditions of your model. Toposolids are created from imported CAD or CSV files. You can also create a toposolid by sketching a boundary and adding elevation points within the boundary. Toposolids support surface patterns of the assigned material and can be cut by other model geometry.
See About Toposolids for additional information.
This feature was suggested by customers on the Ideas forum and is described on the product road map.