I am new to AutoCad and I have been asked to make a 3D geology map of a pit. I have the pit design dxf imported in ac3d and want to map on it. Can I make 3D polylines? Can I draw polylines of geologic features and snap then to elevation contours of the pit design to give them Z dimensions? Does anyone have any experience making 3D geology maps in ac3d? Any help, tips, or tutorials that would help me out with this would be much appreciated. Thanks!