Sample function to change the banner featured image output in Display Featured Image for Genesis to a slideshow. This example is not applied conditionally, so would change the output sitewide. It starts with four image IDs and adds them to the slider output as URLs (required).

functions.php

<?php

add_filter( 'display_featured_image_genesis_backstretch_variables', 'rgc_test_slider_filter' );
/**
 * Change the banner featured image to be a slidehow sitewide.
 *
 * @param array $variables
 * @return array
 */
function rgc_test_slider_filter( $variables ) {
	$image_ids = array( 2023, 2053, 2150, 1947 );
	foreach ( $image_ids as $id ) {
		$variables['slider'][] = wp_get_attachment_image_url( $id, 'displayfeaturedimage_backstretch', false );
	}
	$variables['duration'] = 3000; // this is the default duration value in milliseconds.

	return $variables;
}