ZBrush as a Character Design Tool - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 15

Form
Form represents the shape of a thing as defined by light and shadow playing across the surface. In Figure
1-13 you can see how removing all light and shadow reduces the sculpture to just the silhouette. When
working on a character, you want to define form as fully as possible, making sure it is resolved before you
must move on to the next stages. Form is the difference between a soft-looking character and one that feels
like it has structure and anatomy. One example of how well-resolved form is important is when you need to
represent the contrast between bony, hard shapes under skin and soft, fleshy ones ( Figure 1-14 ) .
Figure 1-13: Form is defined by light and shadow.
Figure 1-14: In this detail, you can see how the soft, fleshy forms of the cheek and eye contrast against the
hard, angled forms of the cheekbone.