Da Vinci Notes 04: Light and Shade on the Sphere
A white ball, a candle and a window: the shadow on the body and the shadow it sends away, why the half-shadow widens, the light the floor gives back, and smoke at the edges.
Leonardo's Manuscript C on light and shade: primary and derived shadows, the three forms, why the penumbra widens, reflected light, lustre and sfumato.


by Marie Curie 