Works marvelously once you hack the relevant child theme

Just need to edit category.php and tag.php in child theme to put the relevant HTML and PHP code.

<div class="archive-meta" style="background-image: url(<?php if (function_exists('z_taxonomy_image_url')) echo z_taxonomy_image_url(); ?>);"><?php echo category_description(); ?></div> in my taxonomy templates.

Some CSS wouldn’t hurt.

.archive-meta {
	padding: 11px 0 11px;
	/* background-image: url(set via php in category.php or tag.php); */
	background-size: cover;}
.archive-meta p{
	margin: 2em 0;
	color: #000;
	background: rgba(255,255,255,.7);
	box-shadow: rgba(255,255,255,.7) 0 0 3em 2em;}

in my child theme style.css file.

Don’t forget the functions.php necessary for child themes to enqueue styles correctly.