I use a LandscapeGrassOutput in my landscape material to render foliage to my scene. For landscape components that do have painted texture on them the foliage shows up where it should as shown with the painted dirt texture to the left (som rocks are spawned on this texture). For the other landscape component to the right, selected in orange, where there are no dirt texture at all, rocks are spawned everywhere. How come this is and how do I prevent LandscapeGrassOutput to spawn foliage on unpainted components?
