module IMP_Picture_Erase
  
  # When this switch is on, all pictures will be erased when the 
  # map is changed
  SWITCH_ID = 3
  
end

class Game_Map

  alias imp_erase_pics setup unless $@
  def setup(*args)
    imp_erase_pics(*args)
    if $game_switches[IMP_Picture_Erase::SWITCH_ID]
      screen.pictures.each { |pic| pic.erase }
    end
  end
  
end