PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a ribbed knit jersey material. It is highly elastic with a matte finish. Unlike the stiff denim in the source image, this fabric is soft and conforming. It absorbs light rather than reflecting it significantly, creating soft, diffuse highlights on the ribbing peaks. - **Key Features:** - **Ribbed Texture:** The vertical micro-stripes (ribbing) must be preserved and warped correctly around the body's curvature. - **Lettuce Hem:** The wavy, ruffled edges on the sleeves and the bottom hem (lettuce edge) are a critical stylistic detail that must be rendered, not flattened. - **Neckline:** The boat-neck cut is wider than the user's current asymmetrical neckline and must replace it entirely. - **Length:** This is a crop top. Unlike the user's current tucked-in top, the simulation must account for a termination above the waistline. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** - **Raised Arms Geometry:** Since the user's hands are behind her head, the torso is elongated. The ribbed fabric must stretch vertically to match this tension. - **Sleeve Generation:** The source garment has short cap sleeves, while the target user is wearing a sleeveless/one-shoulder top. The simulation must generate the sleeves wrapping around the user's upper deltoids. Due to the raised arms, the sleeve fabric will bunch/scrunch slightly at the top of the shoulder and stretch tightly across the armpit area. - **Midriff Exposure:** The source is cropped; the target top is long. The system must generate/in-paint realistic skin texture for the user's midriff where the new hemline ends, matching the skin tone of her arms and face. - **Occlusion Handling:** - **Hair:** The user's hair falls primarily behind her back, but any strands near the nape/trapezius must layer *over* the new boat neckline. - **Wristwatch:** The watch on the left wrist is clear of the torso area but must remain masked to prevent accidental texture bleed. - **Chin/Jaw:** The user is looking upward; the new neckline must sit comfortably below the clavicle, ensuring no collision with the jaw shadow. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in an outdoor, shaded daylight environment (soft, diffuse natural light coming from above/right). The studio lighting on the purple top must be neutralized and relighted to match this ambient outdoor setting. Shadows should be soft, not harsh. - **Color Calibration:** The purple hue of the source garment needs to be color-graded to match the exposure of the user's image. The source image is slightly cool/desaturated; the target image has higher contrast. The purple should appear slightly warmer and more vibrant to match the target's outdoor setting, consistent with how the blue wall and green leaves appear. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including the upward tilt, facial expression, and hair volume, must be completely frozen. - **Body Integrity:** - **No Slimming:** The user's waist width and arm thickness must remain 100% true to the original image. - **Skin Consistency:** The generated skin for the midriff area (exposed by the crop top) must match the grain, lighting, and tan level of the user's existing skin on her arms and neck. Do not use generic skin textures.