Thanks Peter. I did try using get_post_meta, but I couldn't get it to work. Here's the code I tried (using both true and false as the 3rd parameter). I also tried with an extra statment to get ids only, but that's not working either. It's hard to believe this is so difficult.
$post_id = get_the_ID(); // Get current post ID
$meta_key = 'character_image_gallery'; // field ID for Image Advanced field
$mb_images = get_post_meta($post_id, $meta_key, true);
$mb_image_ids = array_keys($mb_images); // get id's only
if (!empty($mb_images_ids)) {
return [
'post_type' => 'attachment',
'post_mime_type' => 'image',
'post_status' => 'inherit',
'orderby' => 'post__in',
'post__in' => $mb_images_ids,
'posts_per_page' => -1,
];
} else {
return [] ;
}
