Artists use many varied techniques in their self-portraits. Perugino added a self-portrait to a historical scene as if witnessing it first-hand. Gustave Courbet uses gesture to add drama to his self-portrait. Details in Vincent van Gogh’s self-portraits can hint at important events in the artist's life. The clean lines and flat color in Horace Pippin’s self-portrait grab the viewer’s eye and invite closer attention. Andy Warhol uses repetition in his self-portrait to communicate a message about consumer culture.