OUTDATED This blog is a bit outdated, and uses gl-react-native 1.3. I highly recommend checking out https://github.com/gre/gl-react-image-effects which was inspired by this post and uses gl-react-native 2.*! Intro Instagram is a fantastic app and a great concept to model after for learning fragment shaders. We won't get too deep into fragment shaders but I'll take a little bit about what they are