and secondly, the ability to identify them in separate orndividual workof art, for example, as we have disibuted here on the wall or hung on the wall. let's first look at or analyze shape and form. what do we mean by shape and form? well, these are clearly discerned. we are talking about color, shapes which our eye clearly distinguishes, and we are able to separate individual shapes of color in the painting that we are looking at. and this is what we mean by shape and form. they can be flat. they can be three-dimensional. what do we mean by mass? and what do we mean by volume? in this painting, for example, by caravaggio, the idea of volume and the idea of mass-- we are dealing with density, with weight. these figures are solid. these figures have a sense of corporeality. they're tangible. and that is achieved through the illusionary techniques that are available to the artist. this i will cover a little further in the program today. what about line? now, line is a very important element of style. line can be used in so very many different ways. it can be obvious. it can be actual. in