Awesome. It works. What if I want to use attachment_id instead of Image URL? It would be great to only show a thumbnail version of the image no matter what size of photos users are uploading.
I know this is this the code:
$attachment_id = get_field('field_name');
$size = "thumbnail"; // (thumbnail, medium, large, full or custom size)
but how do I fit this in my loop?
Thanks