Derive secondary motion from established anatomy and the actual causal movement. Motion follows anatomy; anatomy does not
change to create motion. Use direction-aware inertia, gravity, acceleration/deceleration, damping, balance, posture, support and
contact. Different regions have different plausible responses; never apply one generic oscillation to the whole body.
CAUSE BEFORE EFFECT: acceleration or contact must precede the corresponding secondary response. After-motion loses energy
naturally and settles. Do not create endless oscillation, random jiggle or exaggerated elasticity. Movement Intensity controls the
primary action; secondary motion is then derived physically rather than independently maximized.
WARDROBE COUPLING: When clothing is present, account for its support, friction, stretch, folds and delayed motion. When absent,
remove clothing support without inventing exaggerated body behavior. Camera shake is camera motion and must never be
interpreted as body motion.
I would also reccomend to use a clear image of some breasts as reference