We were doing some filming for a promotional video yesterday at a local billiards/bar/restaurant. It was very dark even with all the lights on and it made for VERY difficult filming with the Phantom 3 Pro. The floor is black with small white speckles, but the phantom 3 pro couldn't see well enough to hold position. Even breathing next to the drone pushed it off course and keeping a straight line was almost impossible. We did manage to get plenty of good footage, but it was difficult at best. Just be aware of dark areas (especially the floor) while filming.