I'm not quite sure I understand what you're trying to do. But I know that Archicad doesn't show 2D entities (lines, polylines, fills etc) in 3D unless they are included in a 3D dwg file, imported as a 3D object (hint: workaround
AC4.1-AC26SWE; MacOS13.5.1; MP5,1+MBP16,1