Margaret Qualley in 'The Substance': Screen Time, on-Set Struggles, and Key Facts
The film's final act strips away every drop of Sue’s aesthetic allure. During the production's chaotic finale, documented in behind-the-scenes reporting from Variety, Qualley had to shed the hyper-glamorous image that defined her early scenes. The narrative climax fuses Elisabeth and Sue into a grotesque, lumbering entity dubbed Monstro Elisasue.
Filming this sequence required an operational setup straight out of classic 1980s creature features. Qualley wore full-body foam suits weighed down by gallons of fake blood pumped through internal plumbing tubes. The set was perpetually slick, cold, and chemically pungent. By intentionally dismantling Sue's pristine presentation in a tidal wave of theatrical viscera, Fargeat and Qualley forced the audience to reckon with the horrifying conclusion of society's obsession with superficial perfection.