Active Terrain Mote Spawner - Vanilla-Expanded/VanillaExpandedFramework GitHub Wiki
TerrainCompProperties_MoteSpawner allows the terrain to release motes
        public ThingDef moteDef;
        public IntRange tickInterval;
        public FloatRange size;
        public FloatRange rotationRate;
        public FloatRange velocityAngle;
        public FloatRange velocitySpeed;
        public Color instanceColor;
        public FloatRange reqTempRangeToSpawn;
        public List<IntRange> reqTimeRangeToSpawn;
        public bool enableSettingsSpawnFogOnHotSprings;
        public float spawnChance;It is a comp class, so you just add it in XML in the <terrainComps> tag of the ActiveTerrain.