First off let me explain what a lights.rad file does. A lights.rad file is a file that contains information about what textures you want to emit light, in using this concept you can create a texture(s) with the same or better effect as a entity, like in Screen Shots A and B. When you're editing a Lights.rad file it should look something like this. Through the steps I will explain what every thing means.
lights/white001\_nochop 250 240 205 100 lights/white002\_nochop 189 233 247 425 lights/white003\_nochop 232 246 190 350 lights/white004\_nochop 170 228 247 425Now that you have your lights.rad I will explain to you on how to add the textures you want emitting light. Step One: Adding the texture(s) you want to emit light to the Lights.rad.
mustafar/ctile\_05 170 228 247 1000 mustafar/hall\_striplight011 43 85 85 40
Get the names of the texture(s) you would like to use. I'm using ctile\_0.vtf. Now add the texture(s) to the Lights.rad they must look like this. mustafar/ctile\_05 Below will explain why you need to add mustafar/ctile\_05 to the lights.rad - Red = The location of the folder with the .vtf texture(s). Example: C:\Program Files\Steam\SteamApps\common\(game name)\(game abbreviation)\materials\mustafar - Blue = The .vtf texture(s) that you want to have emit light from. Example: C:\Program Files\Steam\SteamApps\common\(game name)\(game abbreviation)\materials\mustafar\ctile\_05 - Mustafar / ctile\_05 Now that you have added the texture you have to find out what color you would like it to emit. Find out in step two. Step Two: Adding an RGB color value for your texture(s) to emit.
Selecting a color that you would like you texture to emit is quite easy all you need is to add a RGB color value like in the example below. Example: 128 255 255 Sometimes when I Select a color values I like to use the color chooser In photoshop. If you don't have photo shop using the color chooser In Hammer will work just as good. Then add the RGB color value to the end of your Lights.rad like this. Yellow = The color of light that the texture(s) will emit. Mustafar / ctile\_05 128 255 255 Now that you know how to add a color of light to you texture(s). Move on to Step Three to find out how to adjust the level of brightness the texture(s) will emit. Step Three: Adjusting the brightness of the light on your texture(s).
Selecting a level of brightness for you texture(s) to emit is quite easy its just like adding brightness to any light admitting entity in hammer. All you have to do is add a number to the end of your RGB color value. Like in the example. Example: 128 255 255 450 Orange = The amount of brightness the texture(s) will emit. Mustafar / ctile\_05 128 255 255 450 The higher the number the brighter it will be the lower the number the lighter it will be. Now that you have added all your information Save your lights.rad in the main folder of what ever game you're using it for. Example: C:\Program Files\Steam\SteamApps\common\half-life 2 deathmatch\hl2mp Final Step
Open the map you are working on apply the texture(s) that you added to the lights.rad to a brush Compile your map and check it out. And there you have it, light emitting textures. This was my first tut so sorry if it was hard to understand. But If you have any question feel free to ask. If any of the information is incorrect let me know so I can fix it.