def _create_command_target(self):
        """ Creates the target which processes the commands """
        self._command_target = RenderTarget("ExecCommandTarget")
        self._command_target.size = 1, 1
        self._command_target.prepare_buffer()
        self._command_target.set_shader_inputs(CommandQueue=self._data_texture, commandCount=self._pta_num_commands)
 Creates the target which processes the commands 
metadrive/render_pipeline/rpcore/gpu_command_queue.py