PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a ribbed cotton knit (likely a tank top or bodysuit). It is a matte textile with high elasticity and low specularity (no shine). It functions as a "second skin," contouring tightly to the torso rather than draping loosely like the user's current woven wrap top. - **Key Features:** The "GAP" logo text (currently mirrored as "PAG" in the source reflection) is the primary focal point and must be centered on the chest. The texture is vertically ribbed, which must remain visible to sell the realism. The neckline is a deep U-scoop with wide binding straps. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Unlike the current loose wrap top, the new garment must follow the curvature of the user's torso, adhering strictly to the skin surface. There should be slight tension lines across the chest area due to the knit stretch. The waistline needs to tuck in or sit flush against the skirt waistband, replacing the current bulky tied bow of the blue top. - **Occlusion Handling:** CRITICAL: The user's right hand is pressed flat against the upper chest/sternum. The new garment must be rendered *underneath* this hand and fingers. The user's long, curly hair drapes over the left shoulder and chest; the new tank top strap must pass *under* these hair locks. The phone and left hand obscure the left torso and must remain the top layer. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment has warm, soft, tungsten-based downlighting (shadows fall downwards and slightly left). The source garment has a cool/purple tint from its original room. The white cotton must be temperature-shifted to a "warm white" (matching the tone of the flower in the user's hair) to fit the target room. - **Color Calibration:** Desaturate the purple/pink ambient reflection from the source image. Generate contact shadows where the user's right hand rests on the new fabric and where the hair touches the shoulder straps to ground the object in the scene. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's face, the white flower behind the ear, and the specific curl pattern of the hair must remain absolutely frozen. The position of the phone relative to the face must not shift. - **Body Integrity:** The user's shoulder width, arm volume, and waist definition must remain unaltered. Do not apply "slimming" effects often found in generative models; the tight fit of the new garment should reveal the user's actual silhouette, not a hallucinated hourglass shape. Skin tone on the newly exposed décolletage (due to neckline change) must match the existing neck and arm skin tone perfectly.