Rear view of a woman walking forward with natural hip sway, extreme focus on her massive, round, thick ass cheeks that bounce and jiggle heavily with every step. Realistic soft-body physics: the cheeks clap and ripple outward on impact, then settle with a slow, weighty wobble and side-to-side shake. Oiled, shiny skin that catches light and emphasizes the deep glute fold and under-curve. Slow deliberate gait so the jiggle has time to fully propagate through the flesh. Tight framing on the lower back to upper thighs, camera locked behind her at ass height. Hyper-realistic skin texture, natural weight and inertia in the movement, continuous looping walk cycle.