I am looking for a way to create a 3d polyline on a 2:1 surface, that goes up the surface at say 5%. Does anyone know if there is any routine within civil 3d that can do this? Or any 3d party routines out there that can? I know there is a package out there called carlson civil that has a routine that does this but that is $1500 and I only need this one thing. Any ideas? Thanks in advance!