Joker's secret

The Joker, with his distinctive white face paint, dark eye makeup, and red smile, stands in a dimly lit interior, looking toward another person whose back is to the camera. The scene then transitions to a close-up of a makeup artist using an airbrush on a person's hair, followed by a close-up of a person's face being painted with white and black makeup to create a grotesque, aged appearance, with the artist's hand applying dark makeup around the eye.