So interpolation simply allows you to set the pitch of the camera at that particular waypoint (pre flight). When you use interpolation, you also need to set what that pitch is going to be. A pitch of "0" means the camera is facing straight ahead at the horizon, while a pitch of -90 means it is pointing straight down. Here is an example of how you could use interpolation in a "reveal" shot in a mission; You want to fly the bird towards a beautiful mountain and as you approach, the camera slowly tilts up from looking straight down to a full level view as you fly towards it. On the first waypoint of this shot, set the interpolation to -90, the second waypoint set interpolation to "0". (Make sure that the camera/drone is pointed towards your target by adjusting the "heading" for those waypoints) As the bird flies from WP 1 to WP 2, the camera will slowly tilt up and "reveal" your beautiful mountain.