code: def hide_visualization(self):
          
          for site_name in self.visualization_sites:
              site = self.worldbody.find(".//site[@name='{}']".format(site_name))
              site.set("rgba", "0 0 0 0")
          for geom_name in self.visualization_geoms:
              geom = self.worldbody.find(".//geom[@name='{}']".format(geom_name))
              geom.set("rgba", "0 0 0 0")
docs: Hides all visualization geoms and sites.
          This should be called before rendering to agents