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. It 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