PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a standard cotton jersey knit. It possesses a matte finish with low light reflectivity and high light absorption. Unlike the stiff oxford cloth currently worn by the user, the simulation must exhibit "micro-folding" characteristic of soft cotton—specifically softer creases and more fluid movement. - **Key Features:** The central chest graphic ("Travel is my therapy / Bon Voyage" with the ship illustration) must be preserved without distortion. The crew neckline structure must replace the existing collared neckline. The short-sleeve hems and the double-stitched bottom hemline must be rendered sharply. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The target user has a standard build. The simulation must replace the current rigid, tucked-in button-down silhouette with a relaxed, untucked drape. The fabric must fall vertically from the chest point, likely obscuring the belt and upper trouser waist which are currently visible. *Crucial:* The simulation must perform generative inpainting on the user's lower arms, as the transition is from Long Sleeve (User) to Short Sleeve (Source). - **Occlusion Handling:** The user's hands are positioned at the hips/pockets. If the new t-shirt length extends past the belt line, the hem must interact naturally with the wrists/hands if they touch the torso. The user's chin and neck area must be cleared of the existing shirt collar; no hair obstruction is present. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is situated in an indoor environment with warm, diffuse overhead artificial lighting. The source garment (photographed in dappled outdoor natural light) must be neutralized and relit. Shadows must be cast downwards (under the pectoral muscles and sleeve hems) to match the "nose shadow" direction seen on the user's face. - **Color Calibration:** The vibrant blue of the source tee must be color-graded to accept the slight yellowish/warm cast of the wooden room. The contrast levels must be lowered slightly to match the softer, potentially higher-ISO dynamic range of the user's photo compared to the high-contrast studio shot of the source. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute pixel freeze is required for the user's head from the jawline up, including the hair style. The neck area requires blending where the collar is removed, but the facial structure must remain untouched. - **Body Integrity:** Strict prohibition on transferring the source model's athletic "V-taper" torso shape. The t-shirt must conform to the user's actual torso volume and posture (slight slouch) without slimming the waist or broadening the shoulders artificially.