PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a knit jersey fabric (likely cotton-elastane blend). It exhibits matte light absorption with very low specularity. The physics simulation must account for "stretch" and "cling" rather than a loose drape; the material should conform to the torso's curvature rather than hanging stiffly like the user's current red tunic. - **Key Features:** The central Henley placket with three white buttons (vertical alignment) is the primary anchor point. The scoop/notch neckline structure must be preserved. The short sleeves are hemmed without cuffs. The color is a deep forest green which must maintain saturation without becoming black in shadow areas. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The source garment is short-sleeved, while the user's current garment is long-sleeved. The simulation requires generative in-painting to reconstruct skin texture on the user's forearms and elbows where the red sleeves currently exist. The green top fits snugly; it should follow the user's waistline and bust contours more closely than the current loose red blouse. The hemline should sit at the upper hip, slightly curved. - **Occlusion Handling:** The user's long dark hair falls heavily over both shoulders and the upper chest. This is the primary occlusion layer. The green garment must be composited *underneath* the hair strands. The user's right hand is positioned near the hip; the garment's hem must pass behind the thumb/wrist area if the length extends that far. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment (mall) has high-intensity, cool-toned overhead artificial diffusion. The source garment image has warm, domestic lighting. The green fabric texture must be re-lighted to reflect the cool ambient mall lighting (approx. 4000K-5000K). Shadows should be soft but distinct, cast downwards from the bust and hair, consistent with the overhead mall lights. - **Color Calibration:** Desaturate the "yellow" warmth from the source green shirt to match the neutral/cool palette of the mall floor. The white buttons on the shirt must reflect the bright environmental highlights of the mall, not the dim room lighting of the source. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including facial expression, makeup, and the specific volume/style of the hair, must be frozen and masked out from any generation. - **Body Integrity:** Strictly forbid any morphing or warping of the user's biological measurements. The user's shoulder width, bust size, and waist width must remain constant; the garment mesh must deform to fit the user, not the user to fit the garment. The skin tone generated for the arms (due to sleeve length change) must perfectly match the user's face and neck skin tone.