Reply To: Set featured image as background?

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#20886
Daniel Tara
Keymaster

This function should do the job:

add_filter( 'theme_mod_background_image', 'enlightenment_featured_image_background' );

function enlightenment_featured_image_background( $image ) {
	if( is_singular() && has_post_thumbnail() ) {
		return wp_get_attachment_url( get_post_thumbnail_id() );
	}
	
	return $image;
}