PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a cotton pique or cotton-jersey blend (standard polo material). It possesses a matte finish with low specular reflection, unlike the user's current semi-sheer, crinkled fabric. The simulation must render a medium-weight drape that holds its shape around the collar and shoulders but folds softly at stress points, avoiding the fluid, lightweight fluttering of the current pink top. - **Key Features:** The white V-neck collar with contrast tipping is the primary anchor point and must maintain structural stiffness. The "USPA" embroidered logo on the left chest must be preserved without distortion. The garment is short-sleeved, requiring a distinct transition from fabric to skin on the user's arms, replacing the current long bell sleeves. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The polo shirt must conform to the user's torso volume while respecting the high-waisted trouser line. Due to the user's pose (right arm bent at the elbow, hand raised), the fabric must generate tension wrinkles radiating from the right armpit across the upper chest. The right sleeve hem will ride higher than the left due to the raised shoulder/arm position. The hemline should naturally interact with the waistband of the grey trousers, likely draping slightly over rather than tucking tightly, given the user's relaxed posture. - **Occlusion Handling:** CRITICAL: The user's right hand, fingers, and the stack of gold bangles on the right wrist overlap the torso. These must be segmented and layered *over* the new purple garment. Additionally, the user's long dark hair falling over both shoulders must be masked and composited on top of the new polo collar to maintain depth. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in an outdoor/semi-outdoor corridor with diffuse daylight entering from the right (user's left). The simulation must cast highlights on the left side of the purple garment (user's left breast and shoulder) and deeper, soft shadows on the right side (user's right flank) against the wall. The shadow density must match the shadows currently seen on the grey trousers. - **Color Calibration:** The source image has warm, indoor wood-toned lighting. The target environment is cooler, natural daylight with beige/grey surroundings. The purple hue of the polo must be color-graded to appear naturally lit by the corridor's ambient light, likely requiring a slight desaturation and cooling of the purple tone to avoid looking "pasted on." PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including facial expression, jawline, and the specific hairline/flyaways, must remain frozen and pixel-perfect. - **Body Integrity:** Strictly forbid any warping or slimming of the user's torso, waist, or arm width. The garment mesh must expand to fit the user's actual volumetric data. Since the target is changing from long sleeves to short sleeves, the system must generatively in-paint skin texture on the forearms to match the user's complexion, replacing the pink fabric without altering the arm's anatomical shape.