Yeah man, it only works for materials that are masked and set to receive lighting. You won't have this issue now since you are passing through emissive, but you will still have a darker and a lighter side, just a lot more subtle and will receive lighting the same time terrain around you does. The script is for max yes.
Xoliul, a note for the lighting issue with foliage as well. This is another method I use that works well for me with lighting vegetation. When you place your decals the normals are perpendicular by default and thus can cause lighting to affect it at undesirable times. If a decal is placed on the ground perpendicular, you…
The lighting fix was really easy, just put about 10-25% percent of the diffuse into the Emissive channel. Amount depends on brightness of the textures. And hmm, I know what you mean, but these aren't really mountains. They're tundra plains by the ocean, I think it's at most 50m anove sea level. I don't know if that would…