Parallax: unlink portfolio images in the portfolio expander and single portfolio views

gistfile1.php

<?php

function custom_unlink_portfolio_images() {
	global $post, $themify;

	if( $post->post_type == 'portfolio' ) {
		if( is_singular( 'portfolio' ) || ( ! empty( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ] ) && strtolower( $_SERVER[ 'HTTP_X_REQUESTED_WITH' ]) == 'xmlhttprequest' ) ) {
			$themify->unlink_image = 'yes';
		}
	}
}
add_action( 'themify_post_before', 'custom_unlink_portfolio_images' );