Terrain Material File Format
A terrain material file is a file used to define terrain splat and tile materials. It is a Lua file with the .terrainmaterial extension located in the DATA:art\scenarios\textures\splats or DATA:art\scenarios\textures\tiles folders. Terrain material files have the following format (the alp texture is only required for splats):
material =
{
alp = "<alpha texture name>",
dif = "<diffuse texture name>",
nrm = "<normal map texture name>",
spc = "<specular texture name>",
}