Re: Delftship to Google SketchUp

[Marven]

I just understand that the free DS version does not allow export format like “DXF 3D polyline” but just “DXF 3D mesh”…

In fact that’s not correct, see the attached screenshot below.
Delftship free will export to 3D polylines, but in order to do that there should be 3D curves (stations, or waterlines etc) in your models and visible.
Keep in mind that Delftship will export what is visible, so if you have disabled the display of stations then these will not be exported to a 3D DXF file.