Define Custom Upload Limit for images
<?php
/**
* Define Custom Upload Limit for images
*/
add_filter('wpsight_meta_box_listing_images', 'custom_meta_box_listing_images', 100);
function custom_meta_box_listing_images($meta_box) {
$meta_box['fields']['images']['max_file_uploads'] = false;
return $meta_box;
}