close up of the ass, a woman with a short white pleated tennis skirt, flashes of white panties under the skirt, big bouncy ass, the woman is walking, back view, outside, Create smooth, natural, cinematic motion without warping or deforming, Avoid adding artifacts, hallucinated objects, extra limbs, or distortions or unattached body parts. Produce a cohesive animation with stable details, consistent textures, and clean frame transitions.