0lmake sure your environment is dark, the full-screen the image. Turn the brightness on your device as low as you can still see, then wiggle you screen around a bit. Looks really cool.
The room needs to be dark, then you need to turn your brightness as low as it goes. I tried it some more, don't full screen the image, but make sure you can still get details. Then, focus on the scug and wiggle the screen around.