class Game_Character
  alias _66RPG_screen_z screen_z
  def screen_z(height = 0)
    if $game_switches[10]
      if @tile_id > 0
        return $game_map.priorities[@tile_id] * 32
      else
        return (@real_y - $game_map.display_y) / 128
      end
    end
    return _66RPG_screen_z(height)
  end
end