The dark areas of the painting were kept very thin and transparent with generous amounts of the oil medium. The light striking the painting in these sections would be lost and absorbed into the painting ground. The lighter areas of the picture were treated heavier and opaque with a generous amount of white lead mixed into the paint. Light falling on the painting in a light section is reflected back at the viewer. The effect is a startling realism and three-dimensional quality. The surface of a finished painting resembles a fluid supple mousse, masterfully whipped and modeled with the brush.