I've noticed when using decals (on the terrain in this case) that they don't seem to be effected by lighting. For example, I can turn off the main sun directional light and the decals are still drawn with full brightness on the dark terrain.

Also, seems to be the same for particles too? Lighting doesn't effect them either.

Is this a limitation of decals and particles or might I be doing something wrong?

Would like to know too!

try mesh overlays instead, decals are drawn in blended mode, same as particles, in a separate stage, and they are not affected by lighting

@fatcoder: ah, you may want to try draw decals in RM_OVERLAY mode, maybe that will help.
@aceio: there is Game.World function for creating terrain mesh overlays, also presented in the tutorial.