I have the same setup, with a 3d polyline floating above the railing. I try to extrude the morphed railing but I can not get it to follow below the guide 3d polyline. It keeps snapping to the polyline. How is he constraining his extrusion to follow the 3d polyline?
This might be related, but I can't get my editing planes to show either.
Additionally, I can't figure out how he gets the proper lengths before bending upward. That is, the lower rail properly extends further than the top one before going up.
