For a large urban scene, I have created a simple terrain from a plane with a displacement map. I also have a CAD file that includes pavements, roads and road markings, amongst others. So I was wondering, can I split the terrain mesh, which is all quads with the imported outlines for the roads? To be more specific, can I split the mesh to maintain quads as follows:
The mesh should be split at the itersection between the spline and any edge the spline crosses over without producing any n-gons by leaving vertices that are not located on any edge. If I could increase the subidivision level on the terrain, it may well have sufficient resolution to get away with this method...?
The reason for asking is that I don't think I'm allowed to create a proper terrain manually, since I was already handed one, although it's far from detailled enough (and from Revit). So I'll have to do this the quick and dirty way.
