Skiagraphia

Skiagraphia is a painting technique developed in ancient Greece used to create shadows in an image.

Skiagraphia is often described as a hatching technique used to create the illusion of forms through shading.[1]

Archaeologist Eva Keuls, using passages from Aristotle, suggested that "skiagraphia" was a technique that utilized patches of color that blend from afar, similar to the neo-impressionist paintings of Georges Seurat,[2] but this is disputed by Elizabeth G. Pemberton, who instead suggests that the passages from Aristotle are only in relation to shade and not color.[3]