He painted directly from nature, and he made great use of the lay-figure in the study of draperies, in which he was particularly proficient. He had a special gift for white draperies; as a consequence, the houses of the white-robed Carthusians are abundant in his paintings. To these rigid methods, Zurbarán is said to have adhered throughout his career, which was prosperous, wholly confined to Spain, and varied by few incidents beyond those of his daily labour. His subjects were mostly severe and ascetic religious vigils, the spirit chastising the flesh into subjection, the compositions often reduced to a single figure. The style is more reserved and chastened than Caravaggio's, the tone of color often quite bluish. Exceptional effects are attained by the precisely finished foregrounds, massed out largely in light and shade.