Complex sentence: At the end of the drop sequence, the elevator returns to its loading level, where the idol's green eyes glare from a star field, which then disappear, replaced by the service doors through which guests entered.
Split into simpler sentences: At the end of the drop sequence, the elevator returns to the loading level, where the idol's green eyes glare from a star-field. Both elements disappear and are again replaced by the service doors through which guests entered.