PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a woven cotton or linen blend with a matte finish. Unlike the user's current elastic knit t-shirt, this material is non-stretch and structural. It must exhibit "crispness" at the collar and cuffs but allow for softer, angular folds rather than body-hugging curves. - **Key Features:** The semi-spread stiff collar, the center placket with visible white buttons, and the distinct curved hemline must be preserved. The black brand tag hanging from the button must be digitally removed. The deep packaging creases (grid pattern) on the source cloth should be smoothed out to simulate a pressed, worn state. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** - **Torso:** The user is leaning slightly forward toward the car. The new shirt must hang vertically due to gravity, meaning it will pull slightly away from the lower stomach while pressing against the upper back/scapula area. The fit should change from the current "muscle fit" to a "regular fit," adding slight volume to the silhouette. - **Arms:** The source is long-sleeved. The fabric must extend to the wrists. Given the user's bent right elbow, the fabric must bunch/concertina at the inner elbow (antecubital fossa) and pull taut across the tricep. - **Hem interaction:** The new shirt should drape *over* the belt line (untucked style) to accommodate the curved hem of the source, rather than being tucked into the jeans like the current t-shirt. - **Occlusion Handling:** - **Car Door Frame:** The user is standing partially behind the open car door frame. The new shirt MUST be masked strictly behind the black window frame/door edge. - **Hands/Wrists:** The cuffs will cover the wristbands unless pushed up; assuming standard wear, the cuffs end at the wrist bone. - **Chin/Beard:** The new collar is higher than the current crew neck; it must sit naturally around the neck, potentially interacting with the bottom of the beard. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target scene features soft, diffused, cool-toned outdoor daylight (overcast sky). The source image has warm, localized indoor lighting. The new shirt must be relit to eliminate the yellow/orange tungsten cast and adopt the flat, ambient outdoor lighting. - **Color Calibration:** The pastel yellow of the shirt must be desaturated slightly and cooled down to match the exterior environment. Shadows should be soft and diffuse, appearing primarily under the collar, in the armpit region, and on the underside of fabric folds, matching the low-contrast shadows on the white car. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's hair, sunglasses, nose, beard, and ear structure must be completely frozen. The jawline definition must remain sharp where it meets the new collar. - **Body Integrity:** The user has a muscular, athletic build (broad deltoids and chest). While the new shirt is looser, the underlying bulk of the muscles must be implied through the drape. Do not slim the shoulders or flatten the chest volume.