# File lib/gruff/scene.rb, line 133
  def initialize(base_dir, folder_name)
    @base_dir = base_dir.to_s
    @name = folder_name.to_s
    @filenames = Dir.open(File.join(base_dir, folder_name)).entries.select { |file| file =~ /^[^.]+\.png$/ }
    @selected_filename = select_default
  end