PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a lightweight cotton jersey knit. It is matte, pliable, and has low structural rigidity compared to the user's current heavy sweater. It should absorb light with very soft, diffuse highlights, behaving like a breathable summer fabric that succumbs easily to gravity rather than holding a rigid shape. - **Key Features:** The central white graphic text ("VACATION MOOD" and "California" motif) is the primary focal point and must be centered on the chest. The crew neckline with ribbed binding and the raw-edge or hemmed sleeveless armholes are critical geometry that defines the silhouette. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The tank top will hang vertically from the trapezius muscles, draping much closer to the skin than the current bulky sweater. Unlike the sweater which bunches at the waist and elbows, the tank top must fall relatively straight, potentially gathering slightly at the lower waist due to the user's stance. The simulation must account for the removal of the sweater's bulk, revealing the true width of the shoulders. - **Occlusion Handling:** The user's hands are positioned at the upper chest/neckline, currently grasping the sweater's collar. These hands are a critical occlusion layer and must be rendered *over* the new tank top. Note that the hands are interacting with a collar that will no longer exist; the physics engine must ensure the hands do not clip through the new, lower neckline of the tank top. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user image features outdoor, diffuse, overcast lighting with a cool/bluish color temperature (dusk or cloudy day). There are no hard directional shadows. The bright, warm studio lighting of the source cloth must be neutralized and cooled down to match this flat, ambient lighting environment. - **Color Calibration:** The mint green of the tank top must be desaturated slightly and tinted with the cool blue tones of the environment to blend seamlessly. Shadows cast by the user's hands onto the chest must be soft and diffuse, not sharp. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's profile view, including the jawline, beard, ear structure, and hairstyle, must be completely frozen and preserved. - **Body Integrity:** Do not alter the user's underlying skeletal structure or perceived muscle mass. While the overall silhouette will naturally narrow slightly due to the removal of the thick wool sweater, the user's actual shoulder width and torso volume must remain authentic to the original image.