Just curious... this was something the Ardupilot community was working on and wonder if The M2 can do it perhaps with alternative flight software. By "this" I mean conduct a flight/mission where the aircraft would maintain a constant altitude above ground, not relative to the elevation of the home point. IOW it would follow the land contours up and down to maintain a constant AGL and video perspective without user interaction. I know you can include altitude when you program waypoints. But it would be much easier to have a constant AGL mode, especially if that could be used in free flight.