$images = rwmb_meta( 'gallery', 'size=YOURSIZE' );$images = rwmb_meta( 'gallery', 'type=image&size=YOURSIZE' );if ( !empty( $images ) ) {foreach ( $images as $image ) {//IMAZE 1 "thumbnail" echo '<a href="', esc_url($image['full_url'] ), '" title="', esc_attr( $image['title'] ), '" rel="lightbox"><img style="padding:5px" src="', esc_url( $image['url'] ), '"  alt="', esc_attr( $image['alt'] ), '"></a>';//IMAZE 2 "large"echo '<a href="', esc_url( $image['full_url'] ), '" title="', esc_attr( $image['title'] ), '" rel="lightbox"><img style="padding:5px" src="', esc_url( $image['url'] ), '"  alt="', esc_attr( $image['alt'] ), '"></a>';//IMAZE 3 "full"
    echo '<a href="', esc_url( $image['full_url'] ), '" title="', esc_attr( $image['title'] ), '" rel="lightbox"><img style="padding:5px" src="', esc_url( $image['url'] ), '"  alt="', esc_attr( $image['alt'] ), '"></a>';
}//IMAZE 3 "medium"
    echo '<a href="', esc_url( $image['full_url'] ), '" title="', esc_attr( $image['title'] ), '" rel="lightbox"><img style="padding:5px" src="', esc_url( $image['url'] ), '"  alt="', esc_attr( $image['alt'] ), '"></a>';
}