Active Terrain Self Clean - Vanilla-Expanded/VanillaExpandedFramework GitHub Wiki
TerrainCompProperties_SelfClean allows the terrain to clean itself
It is a comp class, so you just add it in XML in the <terrainComps>
tag of the ActiveTerrain.
<terrainComps>
<li Class="VEF.Maps.TerrainCompProperties_SelfClean">
</li>
</terrainComps>