Would 'Surface' do the trick? https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Other_Language_Features#Surface It's not smooth like a Bezier curve, though. I think that's probably beyond OpenSCAD. You could smooth it more by sub-sampling between the points in the heightmap. Ian -- View this message in context: http://forum.openscad.org/Bezier-Courves-elevation-model-tp20778p20781.html Sent from the OpenSCAD mailing list archive at Nabble.com.