rkaufman13

Maybe the confusion is mine because I deleted the errant code from content-single.php after I realized I was not getting it to work today (without help!). But I was basically using the same code from content-home.php as follows:

global $post;
$postclass = '';

if ( '' != get_the_post_thumbnail() ) {
	$thumb = get_the_post_thumbnail( $post->ID, 'post-thumbnail', array( 'title' => esc_attr( get_the_title() ) ) );
}
else {
	$args = array(
				'post_type' => 'attachment',
				'numberposts' => 1,
				'post_status' => null,
				'post_mime_type' => 'image',
				'post_parent' => $post->ID,
			);

	$first_attachment = get_children( $args );

	if ( $first_attachment ) {
		foreach ( $first_attachment as $attachment ) {
			$thumb = wp_get_attachment_image( $attachment->ID, 'post-thumbnail', false, array( 'title' => esc_attr( get_the_title() ) ) );
		}
	}
	else {
		$thumb = '<span class="no-thumbnail">' . get_the_title() . '</span>';
		$postclass = 'no-thumbnail';
	}
}

As far as I can tell, that attaches all the same CSS classes as on the homepage to the resulting HTML code. Yet the expected properties (size, opacity, etc) aren’t being applied. If it would help to see it in action I can re-add this not-fully-functional code to the site.