Setting multiple default background images?

The following code lets me set a default background image. Is it possible to set multiple custom backgrounds?

add_theme_support( 'custom-background', array(
    'default-image' => get_stylesheet_directory_uri() . '/images/image1.png',   
) );

There is no direct way of doing that as far as I can see. But I got hold of this plugin which allows you to create Image Sets and set random background images -> Background Manager