This is a 2D UHD 4K version of our snorkeling on Rainbow Reef in Nassau, Bahamas. The underwater reef was recorded using a GoPro Hero 4 Black camera mounted on top of our 3D Go Pro rig. It recorded in 4K at the same time as we were recording the 3D images of the reef. The top side shots were all in 2K and upscaled to 4K in edit. Can you tell the difference between the 2K upscaled and 4K?