Glossary · Technique
Sfumatura
The broader process of subtle tonal gradation in painting — encompassing the entire tonal modulation of a surface. Sfumato is the most celebrated application; sfumatura is the philosophical and practical framework behind it.
Italian: from sfumare = to evaporate
Tonal technique
Sfumatura vs. Sfumato
The terms are related but distinct:
- Sfumatura (the abstract noun) refers to the general principle and process of tonal gradation — the idea that values should transition gradually, without abrupt shifts, from the lightest light to the deepest shadow
- Sfumato (the past participle, "smoked") refers specifically to the finished visual effect — the soft, hazy quality of edges and transitions in the final painted surface
In practice, sfumatura is achieved through sfumato technique: by building up dozens of translucent glazes, each so thin it barely changes the tone beneath, the painter creates a surface whose tonal gradations are too fine for the eye to detect individual steps. The result is perceived as continuous, atmospheric transition.
Leonardo's Own Words
"Practise first to draw objects with a freehand outline, without rule or compasses or measuring instruments, so that by practice your hand may become capable of executing perfect tonal gradation [sfumatura]." — Treatise on Painting, §32