The
eye is an important yet complex element within a portrait. A great deal
of emphasis is placed in the eyes as they relate to likeness and
psychology. Understanding its form is the beginning of depicting it
properly. In words, think of its structure, a ball settle into a bone
socket. The brow bone or ridge overhangs the ball slightly. This ball is
then draped, above and below, with two lids that have thickness. To the
center of the face and slightly below middle we find the tear duct.
These lids do not make an opening like a symmetrical football, but
rather peak closer to center on the upper lid, and slightly toward the
outside in the bottom lid. In the eye ball we the sclera (whites of the
eye) the iris (the eye color), pupil (dark spot the resides in the
iris), and the cornea (the lens on the surface). While drawing the eye
it is important to remember these structures as light falls across all
differently.

In
the mouth we find a structure that wraps around the cylinder of the
teeth and head. It is composed of three masses in the upper lip, a
center flanked by two wings. The lower lip is composed of two masses
parted slightly in the middle. The upper lip tappers quickly at the
corners and curls down. The upper lip is usually in shadow since its top
protrudes and then rolls under as it meets the opening. The lower lip
receives light, along the two masses, and sharply descends to shadow
along the middle underside, yet descends to shadow slowly along the
edges as the lip rejoins the facial mass.

The
nose is often one of the hardest features to capture. Again think of
its structure as an aid in depicting it properly. There are three basic
masses to consider- the ball, nostrils and bridge. It has four basic
planes- one top, two sides, one bottom.
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