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Unit 4 — PELVIS & SPINE
LESSON 4-1 ⏱ 10 MIN
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Number 3 — The Pelvis

The number 3 is the pelvis. The two open curves mimic the two curved wings of the hip bones (iliac crests) flanking the central pubic bone. The pelvis is the foundation of the lower figure.

KEY CONCEPTS

  • The pelvis is the central anchor of the lower figure
  • Shaped like an open bowl or the number 3 from the front
  • Iliac crest (top of hip bone) = the visible hip curve in life drawing
  • Pelvic tilt forward or backward directly affects posture and weight
  • The pelvis bridges the spine above and the leg bones below
  • Hip sockets sit at the lower outer corners of the pelvis — where the legs attach

Draw a 3. Now look at the two open curves — these are the two sides of the pelvis as seen from the front. The spine of the 3 is where the pubic symphysis sits at the center. The two curves reach out to either side like parentheses. Enclose the open ends with a baseline connecting them and you have the front view of the pelvis.

Pelvic tilt dramatically affects posture. A forward-tilted pelvis pushes the lower back into a pronounced curve (lordosis) and makes the belly protrude slightly. A backward-tilted pelvis flattens the lower back and pushes the hips forward. Understanding tilt allows you to draw convincing weight shifts and dynamic poses — it is one of the most important concepts in figure drawing.

VOCABULARY

  • Iliac Crest — The curved upper edge of the hip bone — the visible "hip" in life
  • Sacrum — The triangular bone at the base of the spine that fuses into the pelvis
  • Pelvic Tilt — The forward or backward rotation of the pelvis around the hip sockets
  • Hip Socket — The cup-shaped joint where the femur (thigh bone) connects to the pelvis
TRY THIS — 10 MINUTESDraw a 3 in large scale. Enclose the open ends with a baseline. You have the front view. Now draw the same shape from the side — it reads as a narrow wedge or D-shape. Then draw the three-quarter view — a slightly angled box. Practice all three orientations until each one comes naturally from memory.

REFERENCE GALLERY