Hello,   I work with VW 2017, but I'm still not really used to build complex 3d volumes. At the moment I have to model an elliptical stair, and I'm only able to build it in Rhino.   I've exported a DWG file from Rhino and imported it in VW. The imported faces are not really clean (dividied in triangles) and I am also not able to make sections through it and having a nice and clean section/elevation. I guess that this has also to do that rhino works with planes and V