PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a medium-weight cotton jersey (standard streetwear t-shirt material). It has a matte finish with low specular reflection. Unlike the user's current heavy knit sweater, the new fabric is lighter and more pliable. It should exhibit softer, smaller folds rather than thick, bulky creases. - **Key Features:** The vibrant red base color must be maintained. Critical graphic elements include the "CHICAGO" text on the shoulder yokes, the "FR/RT" racing logos on the upper chest, the "93" number, and the checkered flag graphic on the mid-abdomen. The white contrast text must remain crisp but follow the curvature of the fabric. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The user is in a crossed-arm pose, creating significant tension. The t-shirt fabric must pull tightly across the upper back and shoulders. The front graphics (specifically the "FR" and "RT" logos) will likely be partially obscured or folded by the biceps. The lower portion of the shirt (checkered flag area) will hang somewhat loosely below the crossed arms but must conform to the indentation created by the forearms pressing against the stomach. - **Occlusion Handling:** The user's crossed arms (forearms, hands, and the watch on the left wrist) are the primary occlusion layer. These must be segmented and placed *on top* of the new red t-shirt. **Crucial:** The source is a short-sleeve tee, while the user currently wears long sleeves. The simulation must generate natural skin texture for the exposed lower biceps and elbows, replacing the grey sweater sleeves. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in an outdoor environment with dappled sunlight filtering through trees. The lighting is directional (appearing to come from the top-right) with high contrast. The new red garment must cast self-shadows where the fabric folds near the armpits and under the crossed arms. The "dappled" shadow effect (leaves pattern) currently seen on the grey sweater must be projected onto the red t-shirt to integrate it into the scene. - **Color Calibration:** The studio-lit bright red of the source cloth is too sterile. It must be color-graded to match the natural, slightly warm outdoor color temperature. The white graphics should not be pure white (#FFFFFF) but should pick up the subtle warm tint of the sunlight and the cool tint of the shadows. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's face, jawline, hair, and sunglasses must remain pixel-perfectly frozen. No lighting changes should affect the skin tone of the face. - **Body Integrity:** The user's broad shoulder width and stance must be preserved. While the new t-shirt is thinner than the original sweater (resulting in a naturally slightly slimmer silhouette), the underlying skeletal structure and muscle mass of the arms and chest must not be warped or thinned. The legs, jeans, and sneakers remain untouched.