When did the Chiaroscuro and sfumato technique start?

Question: When did the Chiaroscuro and sfumato technique start!?
Best Answer - Chosen by Asker:

Chiaroscuro!.!.!.about 1600!.!.!.see Caravaggio
Sfumato about 1600 !.!.!.see!.!.!.Leonardo Da Vinci

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