3D solid Import from AutoCAD in Solids Modeling Posted December 21, 2018 On 12/17/2018 at 12:14 PM, axhake said: Had a little play with your file; I exported it from ProgeCAD (didnt have AutoCAD) as a STEP file which came into Vectorworks displaying all surfaces. From there it was a quick extrude and copy for the treads, copies the stringer frames to the side and traced over, extruded and copied back into place, quick sutraction of the posts at the bottom and delete all old surfaces. just under 10 mins while I was waiting for AECOsimto finish rendering a plot. Stair - STEP converted.vwx Thats a pretty nice and clean job that you did there! Thank you. But it is a pity that Vectorworks does not import the file properly as it should. With SketchUp the file is imported with 3D solids and not just lines (NURBS).