Complex sentence: D'Amato's early 1980s films were again either horror or adult films, but he also occasionally worked in other genres, directing fantasy, science fiction and softcore pornography films which were often inspired by other productions of the era.
Split into simpler sentences: D'Amato's early 1980s films were again either horror or adult films while occasionally making fantasy and science fiction films and softcore pornography films. These films which were often inspired by other productions of the era.