In L’enfer, the daily scenes are shot in black and white,
and Marcel’s visions and fantasies are shot in color, the improbable color of
madness. To produce these “shock images”, Clouzot could rely on two
exceptional technicians: Claude Leon, head of fabrication at LTC Labs, who
would stop the lab to do his enigmatic printing tests and Michel Deruelle in
charge of makeup who experimented in new ways: actors covered in sequins or
olive oil, blue lipstick, multicolor makeup.
Romy Schneider, Jean-Claude Bercq, and Serge Reggiani in test footage for L'Enfer d'Henri-Georges Clouzot (1964)