This word can not be translated clearly: just as a chiaroscuro shades of weight, as well as in the word 'sfumato' many values, as if shimmering in each other. As for the "relationship between figure and ground ", it is best to look in the records of Leonardo, that he thought about it:" The most important thing in painting is that of the body, it has shown, seem to relief, and backgrounds, their associates, with their deletions seem extending into the wall, which brought to life through a picture of the three perspectives, namely: a decrease in the figures of bodies, a decrease in their values (a decrease in sharpness of the outlines) and a decrease in their colors. Of these three perspectives derived from the first eye, and two others made the air trapped between the eye and the objects visible in that eye. " And the "sfumato", and the relationship between figure and ground is present in almost all the paintings of Leonardo, and in the paintings of other artists. This, apparently, not enough to explain this unusual, "then smiling, then frowning" face of Mona Lisa. Soviet historian and a major scholar of Leonardo da Vinci M. Jack Buckingham wanted to know more. Gukovskij wrote about Mona Lisa, that she stares at the viewer, not just a spectator to it, and that the viewer feels awkward anxiously for this view and at the same time can not take my eyes off the wonderful portrait. So, in the face of the Mona Lisa is not only an extraordinary expression, but this expression is changing all the time! AA Gastev compares smile lingers around the lips Mona Lisa, a one-day tie. Perhaps it was a butterfly, with its rapidly flapping wings, lightning-fast changes of direction of flight will help us in otgadke? Efros wrote: "poluchelovecheskogo, poluzmeinoe being." But the snake is associated with the winding and changing all the time the movement! Consequently, in the face of the Mona Lisa – the movement! But any movement occurs in time, and static tableau – it captured a moment, but maybe these are the sheets of his treatise on painting, which irretrievably lost? Let's try to find existing records of at least a hint of these ideas and research, "Do not you see that the eye embraces the beauty of the world? He is the head of astrology, it creates a cosmography, he advises all human arts and corrects them, motivates people in different parts of the world, he is the emperor of Mathematical Sciences, its science – authentic: he measured the height and size of stars, he found the items and their location.