def copy
      ditto = self.class.new
      @images.each { |f| ditto << f.copy }
      ditto.scene = @scene
      ditto.taint if tainted?
      ditto
    end
def copy
      ditto = self.class.new
      @images.each { |f| ditto << f.copy }
      ditto.scene = @scene
      ditto.taint if tainted?
      ditto
    end
Make a deep copy