Sculpting the Forest Spirit - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 493

3. Using a combination of the Move and Claytubes brushes, define the outer edge of the deltoid and bicep
muscles. Make sure to get the brachioradialis of the forearm where they originate from the humerus and
flow down the forearm ( Figure 8-61 ).
Figure 8-61: Roughing in the arm anatomy