id identifier rubyid_z_index'>z_index</span>
  <span class='ivar'>@render_only_visible</span>      <span class='op'>=</span> <span class='id identifier rubyid_render_only_visible'>render_only_visible</span>
  <span class='ivar'>@clear_sprites_after_draw</span> <span class='op'>=</span> <span class='id identifier rubyid_clear_sprites_after_draw'>clear_sprites_after_draw</span>
  <span class='ivar'>@should_render</span>            <span class='op'>=</span> <span class='kw'>true</span>
  <span class='ivar'>@re