LEARNING THE PLANES OF THE FACE

LEARNING THE PLANES OF THE FACE 
Once you understand the basic structure of the head, you can simplify the complex shapes of the skull into geometric planes. These planes are the foundation for shading, as they act as a guide to help you properly place highlights and shadows.

Shading the Planes of the Face Many types and values of shadows contribute to the piecing together of all the planes of the face. Core shadows-or the main value of the shadows-are a result of both the underlying structure and the light source. Protruding objects, such as the nose, produce cast shadows, like the dark area on the left of this subject's nose. Highlights are most visible when directly in the light's path; here the light source is coming from above left, so the lightest planes of the face are the top of the head and the forehead. The darkest areas are directly opposite the light source, here the left side of the subject's face and neck. Even in shadow, however, there are areas of the planes that receive spots of reflected light, such as those shown here on the chin and under the eye.

THE EFFECTS OF LIGHT 

Lighting the Planes from Above When light comes from above, the more prominent planes of the face-such as the bridge of the nose and the cheekbones-are highlighted. The eyes, which recede slightly, are shadowed by the brow; the sides of the nose, bottom of the chin, and underside of the neck also are in shadow. 

 Lighting the Planes from the Side Features are shaded differently when light hits the side of the face: The eyes are still in shadow, but the side of the face and neck are now highlighted. The shading on the head becomes darker as it recedes toward the neck; the sides of the cheeks appear "sunken"; and the ear casts a shadow on the back of the head.