Snapchat introduces World Lenses: color thy world!
World Lenses add effects not only to our face, but to the world around us as well. You can have rainbow clouds, snow, floating hearts, and a lot more. To activate them, you need to have your phone's back-facing camera active and tap and hold on the screen. Then, cycle through the World Lenses as you would through the normal Lenses feature. Remember to circle back to the selfie camera, because most of these filters also affect your face!