noise2.png from nvidia shader library http://developer.download.nvidia.com/shaderlibrary/webpages/shader_library.html pencil.png based on the work of Shawn Hargreaves http://www.talula.demon.co.uk/postprocessing/postprocessing.html water.png taken from sauerbraten (author not known) http://sauerbraten.org other textures by tbw The textures are free for non-commercial and commercial use. You're free to use and modify them. Attribution would be nice.