Unfortunately there isn't a known way to import a 3ds max model to CSV. OpenBVE does have partial support for .x files however, with my experimentation, only simple .x objects work. You may want to try finding an importer to a .x format and maybe you'll get something in OpenBVE, but again, there is only partial support. When I created a basic cylinder in a .x format, only half the faces showed, giving me a staggered cylinder... Otherwise, there isn't a known way.