public static Brep ToRhino(this DB.Face face, bool untrimmed = false) { var surface = face.ToRhinoSurface(); if (surface is null) { return(null); } var brep = Brep.CreateFromSurface(surface); if (brep is null) { return(null); } #if REVIT_2018 if (!face.OrientationMatchesSurfaceOrientation) { brep.Flip(); } #endif if (untrimmed) { return(brep); } var loops = face.GetEdgesAsCurveLoops().ToRhino().ToArray(); try { return(brep.TrimFaces(loops)); } finally { brep.Dispose(); } }