Would it be hard to add a 3D Cylindrical Tool and/or add it as part of the 3D Shape tool? I don’t mean a solid basic cylinder. We already have basic box, triangle, and cylinder primitives. I’m thinking a tool were you create a custom selected wall shape as a shape profile, and then set a rotational amount around a user defined axis. That way we can make or extrude all kinds of custom radial and tapered shapes, both solid and hollow. Plus with using walls you can set a transparency % with Modify 3D View for glass objects.