Rad Worm
Rad Worm is a MAXScript utility added into Version 1.57 of the Wall Worm Model Tools. It will create a map-specific RAD file for a level that you've designed in 3ds Max.
The tool will find all materials used in the scene that have a color for self-illumination and use that to output a RAD file that you save next to your VMF. Then, when you compile, all faces with that material will give off light.
