Is there a way to turn polylines to 3d polylines?
I have been trying to draw a wall with the following criteria;
the wall is semi-circular in plan view 25 meters radius (to outside).
the wall is 1 meter in width.
there is a steady fall of 2 meters from one end to the other.
I have created a half spiral in the form of a polyline. But a region will not extruded along this path.
Can anyone help?