re the component sprites will not be rendered until <span class='object_link'><a href="../RenderTarget.html#redraw-instance_method" title="Zif::RenderTarget#redraw (method)">RenderTarget#redraw</a></span> or <span class='object_link'><a href="../RenderTarget.html#redraw_from_buffer-instance_method" title="Zif::RenderTarget#redraw_from_buffer (method)">RenderTarget#redraw_from_buffer</a></span> is called - typically via <span class='object_link'><a href="#rerender-instance_method" title="Zif::Layers::SimpleL