In addition to linear perspective, Leonardo introduces two more kinds of perspective: that of colors and of "notizia", or the definition of the contours of bodies. Together, they constitute "aerial" perspective, a phenomenon generated by the air interposed between the eye and the object. The interposition of a greater amount of air (that is, a greater distance) makes objects appear not only smaller but also lighter in color with a bluish tinge, and with more blurred contours.
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