The QER News page has release 6 of Phoenix Quake, using access to the Quake source code to add Quake III Arena-style shader functions to the original Quake. While the included shaders for 500 or so current Quake 1 textures don't exploit the potential of shaders, the new version opens the door to artists looking to get creative with 32-bit texture maps and other Quake III-engine effects. Thanks Tom Cleghorn.