The 'sfumato' effect is the secret
Countless scientists and art historians have analyzed the painting, unearthing surprising findings. In 2008, the mystery behind Mona Lisa's enigmatic smile was solved: a painting technique called "sfumato." Da Vinci applied several thin layers of paint over one another to create a blurred effect and blend the colors. It lends the painting, particularly the face, a rich, yet elusive atmosphere.