I am new here and no business really commenting on such things.....but, it would be nice to have a Litchi specific forum. Just saying..... Anyway, when you set waypoints on a PC in Mission Hub and pick an altitude for each point, is that relative to the ground elevation at that point, or relative to the home position, or perhaps even the first waypoint? I live in fairly hilly terrain, so want to know how it is actually controlled so I keep an appropriate altitude. I have presumed so far for example that if I keep a constant 100 foot altitude at each point, it maintains 100 feet above ground and thus the craft goes higher or lower in hills or valleys. I think I might be wrong here.... And as a bit of a follow up question, can you simply set the entire mission to run at a constant elevation, and not vary the craft up and down as terrain changes? Thanks!