Now, although this method may seem complicated,
artists since antiquity have used anatomical observations to try to get the proportions of the human figure as accurate as possible,
though obviously not to the degree that Alberti was recommending.
Now, in addition to characters, the setting is extremely important, especially when attempting to tell a story realistically.
Renaissance artists essentially needed to create a three-dimensional scene on a two-dimensional surface.
They accomplished this by the use of perspective, a relatively new idea for artists at the time.
In particular, the type of perspective that Alberti advocated was called “Linear One-point Perspective”.
In fact, Alberti was one of the artists who developed the geometry behind linear one-point perspective.
Linear perspective basically consists of drawing straight lines that extend from the forefront of the painting into the background,
lines that seem to be paralleled to each other, but which actually converge on a single point in the horizon, called the vanishing point.
By drawing figures and objects smaller and smaller, as the lines get closer together, the artist is able to create depth in a painting.
This gives the illusion of a third dimension, and makes the work of art more realistic.