Yves Klein "body painting"

ANT 2 (1961) by YVES KLEIN. From an auction. It's estimated at 1.5 million USD.

Unlike other works in the Anthropométries series in which Klein choreographed painted models to leave bodily imprints on paper, in ANT 2 Klein arranged the model, lying face-down on paper, and sprayed blue pigment around the body to create a negative impression.