PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a standard cotton jersey knit. It possesses a matte finish with low specular highlights. The material has a medium weight, allowing for soft folds rather than stiff creases. It should absorb light rather than reflect it, maintaining a non-glossy appearance consistent with cotton. - **Key Features:** The central graphic ("TRAVEL IS MY THERAPY," "BON VOYAGE," and the ship illustration) must be preserved without distortion. The crew neck ribbing structure and the double-stitched hem on the short sleeves and bottom edge are critical geometric details. The specific shade of muted denim-blue must be maintained. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The user is in a leaning pose with a hip tilt. The hemline of the T-shirt must follow the tilt of the waistline, hanging lower on the user's left side (image right) due to gravity. The left arm is bent and resting on a railing; the left sleeve of the T-shirt must bunch slightly at the shoulder/armpit connection and not clip through the arm. Since the target is wearing long sleeves and the source is short sleeves, realistic skin texture generation is required for the forearms. - **Occlusion Handling:** The user's right hand enters a jeans pocket. The bottom right hem of the T-shirt must naturally drape over the wrist or bunch slightly above the pocket entry, ensuring the hand remains "inside" the pocket layer while the shirt sits "outside." The left hand resting on the railing must remain the top layer; the shirt must not overlay the fingers or the railing itself. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment features harsh, high-contrast daylight (sunlight) coming from the upper-left. The source garment, currently lit by soft dappled forest light, must be re-rendered with hard shadows. A sharp shadow must be cast by the user's chin/jaw onto the collar area of the T-shirt. - **Color Calibration:** The target scene has a warm, sunny white balance. The blue of the T-shirt must be color-graded to accept this warm ambient light, preventing it from looking artificially cool or "cut and pasted" from the cooler forest source image. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's face, including the sunglasses, nose, mouth, and hairstyle, must remain absolutely pixel-perfect and frozen. The neck area above the T-shirt collar line must also be preserved. - **Body Integrity:** The user's torso width and leaning posture must remain unchanged. No slimming or athletic enhancement filters should be applied. The skin tone generated for the exposed arms (due to the switch from long to short sleeves) must match the user's visible skin tone on the face and feet.