Page after page showed the same pose from three angles. Turning a head wasn't just rotating a cylinder; it was the sternocleidomastoid stretching like a harp string, the skin folding over the collarbone, the trapezius bunching behind the ear.
"First," he said, "forget everything you think you know. Then, learn to see the planes. The overlaps. The fat and bone and muscle all fighting and dancing together." anatomy for sculptors.pdf
He walked back to the stand. He stopped looking at the anatomical charts in his head and started looking at the topology of the figure. He realized he had treated the navel as just a hole to be poked in. But the book had taught him that the navel is the anchor of the abdominal fascia—it pulls the skin inward, creating a tension that ripples up to the ribs. Page after page showed the same pose from three angles
If you use ZBrush, Blender, or Nomad Sculpt, you need speed. A PDF allows you to: Then, learn to see the planes
Fundamental Anatomy For Sculptors - sciphilconf.berkeley.edu