I am currently working on mobile point clouds in order to extract 3D building models in the residential area. I could successfully classify ground, vegetation and building roof lines, but still have an issue with classifying building walls. The walls are not even classified as vegetation, they are still remained as unclassified. I could probably create 3D building from the roof lines by giving height values, but I want to get the entire building points including walls to create multipatch if I could.
I used FME (LAStools) and ArcGIS in classification process as well as viewing and analysis.