PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a matte cotton jersey blend with moderate elasticity and low light reflectivity. The shoulder panels appear to be a faux-suede or textured microfiber, which will absorb light more aggressively than the main body fabric. The physics engine must simulate soft body dynamics, allowing for minor wrinkling without the stiffness associated with the user's current button-down shirt. - **Key Features:** The large, distressed "ROADSTER" typography and accompanying script text must be preserved with high fidelity. The contrast between the black body, the brown shoulder patches, and the grey ribbed neckline/cuff trim is critical. The "Snow Mountains Alaska" text layout must not be warped illegibly during the wrap. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's semi-profile (approx. 45-degree) pose, the "ROADSTER" graphic must be perspective-warped to wrap naturally around the curvature of the pectorals and ribcage. The garment is a short-sleeve tee replacing a rolled-up long-sleeve shirt; the simulation must generate realistic skin texture for the user's upper arms (biceps/triceps) which are currently covered. Gravity will pull the hemline straight down, creating a diagonal gap relative to the user's angled waist. - **Occlusion Handling:** The user's left hand and the mobile phone are the primary occlusion layers. The new garment must be rendered strictly on a layer *behind* the left forearm, hand, and device. The user's chin is tucked; the crew neck of the t-shirt must sit naturally at the base of the neck without clipping into the jaw shadow. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment is high-contrast natural daylight with dappled lighting from foliage. The flat studio lighting of the source garment must be replaced with a single-source directional light coming from the upper right, casting shadows consistent with the user's facial shadows. The black fabric must not crush to absolute black; it requires diffuse environmental reflection (green/brown cast from surroundings) to ground it in the scene. - **Color Calibration:** The source garment is cool-toned studio black. This must be warmed slightly to match the outdoor sunlight temperature. The brown shoulder patches must react to the sunlight, showing texture highlights rather than appearing as flat colors. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's hair (fade cut), ear structure, facial profile, and skin tone on the neck and face must be frozen and masked pixel-perfectly. - **Body Integrity:** The user's somatic structure (shoulder width and torso depth) must remain unaltered. Do not morph the user's body to match the source model's "V-taper" physique. The user's specific posture (leaning slightly forward/looking down) determines the garment's center of gravity, not the mannequin's posture.