PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a jersey knit cotton tank top. It possesses a high drag coefficient relative to skin but high pliability. Unlike the user's current stiff woven button-down, this fabric must exhibit soft-body dynamics, clinging slightly to the pectoral muscles and draping vertically without rigid folding. The surface is matte with no specular highlights; light absorption should be uniform. - **Key Features:** The intricate black "grunge/distressed" graphic pattern and the central red/orange typography ("HAND JUNK CLUB") are non-negotiable anchors. The yellow ribbed binding (piping) around the neckline and armholes provides structural definition and must render with slightly more thickness than the main body fabric. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** This is a radical silhouette change from a long-sleeve loose button-down to a sleeveless fitted tank. The physics engine must ignore the volume of the current blue shirt. The tank top must hang from the trapezius muscles, draping closer to the torso than the current garment. Crucially, the simulation requires **generative inpainting** for the user's arms and upper chest, as the target garment exposes skin currently covered by the blue shirt. Gravity will pull the hem straight down, removing the bunching seen in the user's current tucked/untucked transition. - **Occlusion Handling:** The user's pose is open with no hand obstructions. However, the chin area and neck transition are critical; the current high collar of the blue shirt occludes the neck base. The new scoop neckline requires the precise removal of the blue collar and the reconstruction of the suprasternal notch and clavicle area, ensuring no artifacts from the old collar remain. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment utilizes soft, diffuse studio lighting (high-key), likely a large softbox from the front-left, creating gentle shadows on the user's right side. The source garment's lighting is slightly harsher with higher contrast. The yellow tank must be re-lit to match the User Image's diffuse albedo, softening the shadows in the fabric folds to match the ambient occlusion of the user's jeans. - **Color Calibration:** The source yellow is vibrant. To sit naturally in the target's muted/cool-toned environment (light blue jeans, grey background), the saturation of the yellow must be slightly desaturated or color-graded to ensure it doesn't appear superimposed. The black print must match the black point of the user's hair for visual consistency. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including the specific volume of the curly hair, eyes, nose, and jawline, is a rigid exclusion zone. No pixels above the mid-neck line may be altered. - **Body Integrity:** While the silhouette will physically narrow because the tank top is tighter than the loose shirt, the underlying skeletal width (shoulder span, hip width) must remain identical. The skin tone generated for the exposed arms and chest must be an exact biological match to the user's face and hands, respecting the user's specific complexion.