A 3D video of an adult Caucasian male demonstrating posture change. The video shows a smooth transition from correct upright posture to a hunched posture. No 3D models, no animation, no anatomical overlays. Real human, real skin texture. Scene Description A shirtless adult white male, athletic or average build. Side profile only, camera framed from head to mid-torso. Neutral indoor studio or gym background, soft natural lighting. Educational posture demonstration, non-sexual. Action & Motion At the beginning, the man stands upright and tall, chest open, shoulders back. His facial expression is confident and relaxed. A thin vertical line appears along the back of his body, aligned with the spine, marking correct posture. Over time (smooth transition): The head moves forward The shoulders round inward The upper back begins to curve into a hunch The vertical back line bends and shifts, clearly following the spine’s change in alignment. As posture worsens: His expression subtly changes from confident to awkward / embarrassed / uncomfortable Neck tension and forward head posture become obvious The back line visually shows deviation from neutral alignment Ending State Final frame shows a clear hunched posture Head forward, shoulders collapsed, upper back rounded The tracking line is visibly curved, highlighting poor posture Camera remains steady to allow clear observation of the posture change Style & Technical Settings Real-life footage, documentary / educational tone Smooth motion, no jump cuts No text, no arrows, no icons (only the posture tracking line) Natural camera lens, no cinematic exaggeration Aspect Ratio: 16:9 or 9:16 Duration: 6–8 seconds less