Answer to SO question: http://stackoverflow.com/questions/26345737/how-to-draw-camera-video-as-background-on-ios-using-swift-scenekit
NicoHinderling/make-camera-sceneview-background
Answer to SO question: http://stackoverflow.com/questions/26345737/how-to-draw-camera-video-as-background-on-ios-using-swift-scenekit
Swift