def _create_managers(self):
        """ Internal method to create all managers and instances. This also
        initializes the commonly used render stages, which are always required,
        independently of which plugins are enabled. """
        self.task_scheduler = TaskScheduler(self)
        self.tag_mgr = TagStateManager(Globals.base.cam)
        self.plugin_mgr = PluginManager(self)
        self.stage_mgr = StageManager(self)
        self.light_mgr = LightManager(self)
        self.daytime_mgr = DayTimeManager(self)
        self.ies_loader = IESProfileLoader(self)
        self.common_resources = CommonResources(self)
        self._init_common_stages()
 Internal method to create all managers and instances. This also
        initializes the commonly used render stages, which are always required,
        independently of which plugins are enabled. 
metadrive/render_pipeline/rpcore/render_pipeline.py