ted by highly figurative and downright strange religious paintings, Leonardo's desire to paint things realistically was bold and fresh. This call to objectivity became the standard for painters who followed in the 16th century.No slouch when it came to the techniques of the day, Leonardo went beyond his teaching by making a scientific study of light and shadow in nature. It dawned on him that objects were not comprised of outlines, but were actually three-dimensional bodies defined by light and shadow. Known as chiaroscuro, this technique gave his paintings the soft, lifelike quality that made older paintings look cartoony and flat. He also saw that an object's detail and color changed as it receded in the distance. This technique, called sfumato, was originally developed by Flemish and Venetian painters, but of course Super-Genius Leonardo transformed it into a powerful tool for creating atmosphere and depth.Alas, Leonardo's interests were so broad, and he was so oftencompelled by new subjects, that he usually failed to finish what he started. This lack of "stick-to-it-ness" resulted in his completing only about six works in these 17 years, including "The Last Supper" and "The Virgin on the Rocks," and he left dozens of paintings and projects unfinished or unrealized. He spent most of his time studying observing things or by locking himself away in his workshop cutting up bodies or pondering universal truths. Between 1490 and 1495 he developed his habit of recording his studies in meticulously illustrated notebooks. His work covered four main themes: painting, architecture, the elements of mechanics, and human anatomy. These studies and sketches were collected into various codices and manuscripts, which are now hungrily collected by museums and individuals (Bill Gates recently plunked down $30 million for the Codex Leicester!). After the invasion by the French and Ludovico Sforza's fall from power in 1499, Leonardo was left to search f...
