Penumbra . Calyx Solskogen . 2011 code: xeche preglow absence music: phobium Concept/idea and main code by xeche. Additional code by preglow and absence. Music by phobium. Blur shader shamelessly stolen from MFX. Greetings: kvasigen, kusma, menace, mfx, xerxes Fuckings: xeche (see explanation below) Special thanks to the awesome Mr. Sheng at AMD who provided the solution to the amd problem. As it turns out, it was not a problem with AMD. Rather, one party strictly follows the standard and the other allows some behaviour that may or may not be questionable. Should run on most things now.