Film Grain post-process shader v1.1
Martins Upitis (martinsh) devlog-martinsh.blogspot.com 2013

This work is licensed under a Creative Commons Attribution 3.0 Unported License.
So you are free to share, modify and adapt it for your needs, and even use it for commercial use.

Uses perlin noise shader by toneburst from http://machinesdontcare.wordpress.com/2009/06/25/3d-perlin-noise-sphere-vertex-shader-sourcecode/
