PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a medium-weight denim with a tight weave. Unlike the user's current sheer/flowy yellow top, this material is rigid and structural with low elasticity. It has a matte finish, but the metallic buttons and tight weave will catch specular highlights. The fabric will not drape or flutter; it will hold its shape against gravity. - **Key Features:** The gold/brass metal shank buttons, the distinct double vertical "princess seam" stitching, and the two front patch pockets are critical details. The "W" shaped pointed hemline and the deep V-neck cut must be preserved. The contrast stitching (yellow thread on blue denim) is a defining texture element. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The vest is sleeveless, whereas the user is currently wearing long sleeves. The simulation must generate natural skin texture for the user's arms to replace the yellow sleeves. The vest is a structured garment; it should hug the torso contours without the excessive gathering seen in the current yellow top. The vest will sit closer to the body at the waist compared to the flared silhouette of the current top. - **Occlusion Handling:** The user's thumbs and forefingers are currently gripping and flaring the hem of the yellow top. Because denim is stiff, it cannot stretch to that width without unnatural distortion. The simulation must prioritize the denim's rigidity, placing the vest hem closer to the body, and ideally inpaint the hands to a relaxed position *or* show the denim under tension if the hand position is strictly preserved. Necklaces or skin at the neckline must be layered *over* the vest's V-neck. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in a room with warm, overhead artificial lighting, casting soft shadows downward and slightly to the user's left. The denim's blue tone must be color-graded to absorb this warm ambient light (shifting slightly away from cool daylight blue). Shadows from the vest's hem must be cast onto the black trousers. - **Color Calibration:** The source image has flat, neutral lighting. The contrast of the denim needs to be increased to match the dynamic range of the user's photo. The brass buttons should reflect the warm hues of the wooden door and tiled floor. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head region, including the glasses, hair, jawline, and smiling expression, must be strictly masked and frozen. No pixel alteration is permitted above the neck seam. - **Body Integrity:** The user's torso volume and hip width must remain consistent. Do not slim the waist or alter the body mass index to fit the garment. The generated skin for the arms must perfectly match the skin tone of the user's face and neck.