Lights.rad
Overview
Lights.rad, is a file that specifies the color, and Brightness values for materials that can cast and receive Light. This applies to Materials that are of any shader. A lights.rad file already exists within a normal Game directory, however it is possible to make your own.
However these are the current Shaders most commonly used to cast Light:
A lights.rad file can be edited with any preferred text editor, and most commonly looks like this:
lights/white001 250 240 205 100 lights/white002 189 233 247 425 lights/white003 232 246 190 350 lights/white004 170 228 247 425 lights/white005 234 235 220 375 lights/white006 234 235 220 100
Aside that, the file can also specify other parameters beside lighting values. I can also tell VRAD to ignore lighting on certain materials, or to calculate shadows based on a Textures Alpha channel.
- The below command tells VRAD to skip shadows casted on this material. Therefore shadows will not be calculated on this material.
noshadow tree_deciduous_01a_branches.vmt
This command, however tells VRAD to calculate shadows based on a models Texture. More importantly on the textures within the Model that contain an Alpha channel.
forcetextureshadow props_wasteland/interior_fence001a.mdl