So I've got a multi-level building that I designed in Arch. 2012. Now I'm using AutoCAD 2012 to draft out the building. The problem I'm having is that I can't see my wall sheeting or doors when I cut a plan view using 3DCLIP in a viewport. The building has been inserted into the drawing. Is there anything I can do to fix this or am I stuck drawing in some lines to represent the walls and doors?