Re: Help With Lights
I don't think you need the lights.rad for light_enviroment to work, because sin episodes doesn't have one.
The only use I've ever found for lights.rad is for textured lighting, that's when you make a texture on a brush create light instead of using an entity.
If you really want a lights.rad file just create one or copy one from half-life 2, as far as I can tell it's just a text document with settings for textured lighting.
You should be able to find one in
root:\Program Files\Steam\SteamApps\emailaddress\half-life 2\hl2