Craig K..Hi from Italy. When using Litchi hub on your computer and plotting waypoints arround uneven terrain, there is now an ‘Above Ground’ check box. If you click on this, your drone will follow changes in elevation of the terrain automatically. So, if you have set an altitude of, 250 ft, your drone will stay at 250ft above the ground below the drone, and follow the changing hight of the ground. It works well;…but do make sure that you set enough AGL altitude to clear obstructions and high trees etc.