I got an idea and started modeling, then at one point subdivide is not working, no doubles, edges and vertices, everything goes same, but those few faces are not getting split properly: I guess only way is to split them one by one and make faces individually. Here again, it did not want to subdivide triangles, so I did subdivide quads and moved edge loop with shift-V closer to point: Not sure why that happens, but there are lot of such which I'm not sure about. Update: Experimenting: Just a visual study: Probably will not happen, as it is too problematic at least in current BeamNG version, shadow issues and disappears too soon etc. Then again it might be just my inability to solve those issues. Then again there is the solar system.