setShadowCastingLightsDirty() {
    this.batchShadowCastingLights.setObjects(this.shadowCastingLights);
    for (let i = 0, il = this.shadowCasters.length; i < il; i++) {
      this.shadowCasters[i].setShadowCastingLightsDirty();
    }
  }
Forces shadow casting lights and occluders to rebuild.