On the samsung galaxy s6 you can invert the screen color that makes it almost look 3d. To do this go into the settings on your galaxy s6 and click on accessibility and then click direct access. Next make sure the top is turn on to the right and that negative colors is check marked green. Then go back to the home screen and click the home button 3 times quickly and the screen on your samsung galaxy s6 will invert. It will also do this if you open your camera and want to take a picture or shoot a quick video. Its just a cool little trick that you can do on your galaxy s6 so definitely give it a try.