LWto3DPoly.lsp.zip – LISP program converting LWPolylines to 3DPolylines while preserving OD and XData.
AutoCAD Map/Civil 3D, 2010-2022.
Author: CADaSchtroumpf, Bruno Valsecchi; Privas, Ardèche, FR.
Call command: LWto3DPoly.
Pre and post selection is valid.
The command converts the specified LWPolylines to 3DPolylines while preserving OD and XData and all other graphical properties.
See also, C3D.lsp - a less powerful analog.