3dpolyline 2025 aecc_feature_line annotation api appearance are schedule attribute autocad autolisp bim bim 360 block block editor c3d 2017 cad management cad standards civil 3d construction cloud crop region cui delete all details dynamo editor error autocad crash families field filled region folders footings foundation walls grading optimization graphic display grips ifcguid layer lighting fixtures linetype lisp lisp routine macro material appearance mep design services mep engineering objectarx offset plumbing project navigator pyrevit python rename revit schedules section head shape shp slow stacked fractions standards tag family text toposolid topo solids transparency unreal editor vba viewport visibility xref