Complex sentence: An alternative cover design was released in some European countries, featuring primarily a green cover with only a few of the nude models in boxes in the center; some concerts promoting the album featured actual nude models positioned in boxes onstage behind the band members.
Split into simpler sentences: An alternative cover design was released in some European countries, featuring primarily a green cover with only a few of the nude models in boxes in the center. Some of concerts promoting this album featured actual nude models positioned in boxes onstage behind the band members.