PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a structured, corset-style crop top, likely made of a stiff silk-blend or raw silk with minimal elasticity. It features metallic/zari threadwork. Unlike the user's current flowy blouse, this fabric will not ripple or fold significantly; it must maintain a rigid, form-fitting architectural shape against the torso. Specular highlights should be sharp on the gold chevron stripes due to their metallic nature. - **Key Features:** The sweetheart neckline, thin spaghetti straps, and the specific V-shaped alignment of the gold chevron pattern are critical. The central vertical seam structure and the distinct cropped hemline (ending at the mid-ribcage) must be preserved. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The source garment must be warped to follow the curvature of the user's bust and ribcage tightly, replacing the volume of the current loose blouse. The spaghetti straps must trace a natural line over the user's trapezius muscles. Since the user is currently wearing long sleeves and the target is sleeveless, skin texture synthesis is required for the arms and shoulders. The hem of the new top will sit higher than the current skirt waistband, requiring careful handling of the midriff area. - **Occlusion Handling:** The user's long dark hair falling over her left shoulder (viewer's right) and onto the chest is a primary occlusion layer. A segmentation mask must isolate the hair strands to ensure the red fabric and left strap are rendered *behind* the hair volume, not on top of it. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user's environment has diffuse, overhead artificial lighting (cool/neutral white), resulting in soft, undefined shadows. The source garment currently has directional studio lighting (warm side light). The render must neutralize the source's heavy contrast and apply a uniform, overhead ambient occlusion to match the flat lighting of the room. - **Color Calibration:** The vibrant magenta/red of the source needs to be slightly desaturated and cooled to match the white balance of the user's room. The gold metallic threads should reflect the room's white light rather than the source image's warm studio bulb tone. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head region, including facial structure, makeup, and hair position, must remain pixel-locked. - **Body Integrity:** Strict prohibition on body reshaping. The corset top must be expanded and warped to fit the user's existing anthropometric data (bust and waist circumference) exactly as shown in the input image. Do not slim the arms or torso to match the source model's proportions.