A Biomechanical Character - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 335

For this character, I want to let the negative spaces infringe on areas where the viewer will expect there
to be body. By knocking out negative space behind the head or in the waist, it creates a surprise for the
viewer. They register a humanoid form but one with holes where they should not be. This creates a sense
of the unexpected and hopefully helps generate interest in the design. The viewer will have their expect-
ations upset, which should make the character more appealing to look at closer.