biblical and mythological scenes in high contrast and of large format (The Blinding of Samson, 1636, Belshazzar's Feast, c. 1635 Danaë, 1636 but reworked later), seeking to emulate the baroque style of Rubens. With the occasional help of assistants in Uylenburgh's workshop, he painted numerous portrait commissions both small (Jacob de Gheyn III) and large (Portrait of the Shipbuilder Jan Rijcksen and his Wife, 1633, Anatomy Lesson of Dr. Nicolaes Tulp, 1632). By the late 1630s, Rembrandt had produced a few paintings and many etchings of landscapes. Often these landscapes highlighted natural drama, featuring uprooted trees and ominous skies (Cottages before a Stormy Sky, c. 1641; The Three Trees, 1643). From 1640 his work became less exuberant and more sober in tone, possibly reflecting personal tragedy. Biblical scenes were now derived more often from the New Testament than the Old Testament, as had been the case before. In 1642 he painted The Night Watch, the most substantial of the important group portrait commissions which he received in this period, and through which he sought to find solutions to compositional and narrative problems that had been attempted in previous works. In the decade following the Night Watch, Rembrandt's paintings varied greatly in size, subject, and style. The previous tendency to create dramatic effects primarily by strong contrasts of light and shadow gave way to the use of frontal lighting and larger and more saturated areas of color. Simultaneously, figures came to be placed parallel to the picture plane. These changes can be seen as a move toward a classical mode of composition and, considering the more expressive use of brushwork as well, may indicate a familiarity with Venetian art (Susanna and the Elders, 1637–47). At the same time, there was a marked decrease in painted works in favor of etchings and drawings of landscapes. In these graphic works natural drama eventually made way for quiet Dutch rural scenes. In the 1650s, Rembrandt's style changed again. Colors became richer and brush strokes more pronounced. With these changes, Rembrandt distanced himself from earlier work and current fashion, which increasingly inclined toward fine, detailed works. His use of light becomes more jagged and harsh, and shine becomes almost nonexistent. His singular approach to paint application may have been suggested in part by familiarity with the work of Titian, and could be seen in the context of the then current discussion of 'finish' and surface