How to display multiple live filters at once like iOS 7 Camera App

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In the iOS 7 camera app, if you click on the icon in the bottom right corner it opens a collection view that is a 3x3 grid showing a live preview of different filters. How can this be recreated for our own app purposes? I have tried using GPUImage but I am only able to display one GPUImageView at a time and I can't figure out what I am doing wrong.

asked 14 secs ago

Dmitry

15