Hide Tiff thumbnails in WordPress admin. Useful for when dealing with large TIFF files, thumbnail aren't created so it tries to load tiff image into media library.

hide-tiff-thumbnails

/**
 * Don't try to show TIFF thumbnails in admin
 */
function my_wp_prepare_attachment_for_js( $response, $attachment, $meta ) {
  if ( is_admin() && $response['type'] == 'image' && in_array( $response['subtype'], array( 'tiff', 'tif' ) ) ) {
		$response['type'] = 'application';
	}
	return $response;
}
add_filter( 'wp_prepare_attachment_for_js', 'my_wp_prepare_attachment_for_js', 10, 3 );