Custom re-render in a for-each template

I have a Ember component that is based in a list rendered with the for-each helper. Is a photo album. But some times pictures are added from server side and they are shown in the album. When this happens once or twiced the render is ok. But when many new pictures are added, all the list are rendered for each time one picture is added.

Is there a way to customice the way this list is rendered for not to delete all the list and render it again, just add a new picture at the top?

Have a look in the api docs