Writing to see if anyone has come up to a solution to this problem - we find it really difficult to make furniture dotted and see through in elevation view. Furniture objects vary from downloaded meshes / symbols, to custom furnture we model with vectorworks geometry. Regardless, they go in their own class, but class overrides are inconsistent at best at changing the display in elevation view.
Attached is an example, 3 furniture items, lamp (downloaded), office chair (download) and floor (modelled in vecotworks, legs are floors and top is a NURBS surface.) With class overrides as dotted lines with no fill, none of the objects show this way. Has anyone found a way to display this information in elevation view? Manually tracing furniture is inefficient and causes problems with furniture items are replaced and moved around. The furniture view is essential for us to design the wall finishes and locations of various installations.