He is a hungarian-born french painter who painted geometric abstractions and was a prominent influence on the Op art movement.
Refers to the visual quality of the surface of an object, revealed through variances in shape, tone and color depth. Texture brings life and vibrance to images that would otherwise appear flat and uninspiring.
That is a painting of Judith and her Maidservant. 1615 painting by the Italian baroque artist Artemisia Gentileschi. It hangs in the Pitti Palace, Florence.