Quadruped foundation (skeleton, major muscle groups)

Map a four-legged animal’s skeleton and major muscle groups before adding species-specific details.

What it is

You can sketch a four-legged animal’s skeleton with simple forms for the skull, spine, ribcage, pelvis, and limb chains. You can place the neck, back, hips, and major joints, including the elbows, knees, and hocks, or rear ankles.

You can identify the surface muscle masses around the shoulders, hips, thighs, upper arms, spine, belly, knees, elbows, and hocks. You can distinguish bone, muscle, fat, and skin in the silhouette.

You block in a stick-figure skeleton and simple volumes, such as boxes, cylinders, and eggs, before refining the contour. You can turn the structure in space or change the pose while keeping joints and limb lengths consistent.

Why it matters

This foundation supports consistent quadruped poses, proportions, and body volume. Weak control can cause incorrect leg bends, misplaced joints, or inconsistent structure when the animal is turned, foreshortened, stylized, or covered with clothing or armor.

You can check it when

✓Sketch a generic four-legged skeleton from front, side, and 3/4 views. Check the joint locations and proportions against real animals afterward.
✓Mark the skull, ribcage, pelvis, shoulders, elbows, hips, knees, and ankles on a quadruped photo, including where they sit under fur or skin.
✓Change the same quadruped design to be more muscular, chubby, or lean while keeping its bony landmarks and main muscle masses in consistent places.
✓Add clothing or armor to a stylized quadruped and verify that each leg still bends correctly and that the knees and ankles remain traceable.

Quadruped foundation (skeleton, major muscle groups)

What it is

Why it matters

You can check it when

Related skills