Get exterior face of a wall

[viktor_kuzev]

see if that topic helps:

Get an outer boundary of multiple polygons (Room Boundaries)

I’m almost achamed of how dirty it is … but works! [image] in designscript: [image] pc = PolyCurve.ByJoinedCurves(c); dist = 500; co = Curve.Offset(pc, dist); sf = Surface.ByPatch(co); th1 = Surface.Thicken(sf,500,1); solidunion = Autodesk.Solid.ByUnion(Flatten(th1)); sf2 = Autodesk.Geometry.Intersect(solidunion,Plane.XY()); pc2 = sf2.PerimeterCurves(); pc3 = PolyCurve.ByJoinedCurves(pc2); Curve.Offset(pc3,-dist);