PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a standard mid-weight cotton jersey. It has a matte finish with high light absorption and low specularity. The simulation must replicate the softness of worn cotton, avoiding the stiffness of starch or the sheen of polyester. - **Key Features:** The arched white outline text "LOS ANGELES" and the smaller "CALIFORNIA" text below it are the primary visual anchors; these must be clearly legible but correctly warped. The crew neck collar ribbing and the double-stitched hem on the sleeves and bottom edge must be preserved. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's side/oblique stance and forward-leaning pose, the garment needs to drape vertically from the chest, separating slightly from the lower abdomen rather than clinging. The "LOS ANGELES" graphic must undergo cylindrical perspective warping to wrap naturally around the curvature of the pectoral muscle and ribcage, appearing shorter on the far side due to the angle. Tension folds should appear at the armpit and shoulder anchor points. - **Occlusion Handling:** The user's left arm is the primary occlusion point; the new sleeve must contour around the bicep/tricep without clipping into the skin. The lower right arm resting on the wall implies the torso is slightly compressed; the hemline should react to the top of the jeans but remain untucked. The heavy shadow cast by the chin onto the upper chest must be re-projected onto the new collar. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The scene features harsh, high-contrast outdoor sunlight coming from above and slightly to the left. The new brown garment must exhibit a high dynamic range: bright, warm highlights on the left shoulder and upper chest, transitioning sharply to deep, cool-toned shadows under the armpit and along the right side of the torso. - **Color Calibration:** The source garment's flat chocolate brown must be adjusted to match the outdoor color temperature. The sunlit areas should shift towards a warmer bronze-brown, while the shadowed areas should pick up slight blue ambient fill from the open sky to ground the object in the outdoor environment. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including the specific hairstyle, sunglasses, nose shape, and jawline, must be completely frozen. The skin tone on the neck and visible arms must remain untouched. - **Body Integrity:** Strict prohibition on altering the user's muscular build or the geometry of the leaning pose. The width of the shoulders and the volume of the chest must correspond exactly to the original image to maintain the subject's physical identity.