PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a heavyweight cotton-blend fleece (sweatshirt material). It has high structural integrity and significant thickness. Unlike the user's current thin t-shirt, the hoodie must not cling to the skin; it must simulate a semi-rigid drape with soft folds. It has a matte finish that absorbs light rather than reflecting it. - **Key Features:** The central zipper mechanism, the specific horizontal zippered chest pocket on the left breast, and the vertical side pocket details must be preserved. The contrasting light grey inner lining of the hood and the dual-tone cuffs (dark blue exterior with light grey ribbed interior/extension) are critical design elements to retain. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The garment must expand the user's silhouette slightly due to the fabric thickness (volumetric layering). The shoulders should sit slightly higher and wider than the current t-shirt seams. The hood needs to bunch realistically around the back of the neck and drape over the trapezius muscles. The zipper line must follow the center contour of the chest, bowing slightly outward to indicate volume. - **Occlusion Handling:** The user's beard is the primary occlusion layer; the hoodie's collar/neck area must render *behind* the facial hair at the jawline. The user's arms are held close to the body; the simulation must prevent the heavy fabric of the sleeves from clipping into the side torso mesh. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user's environment has a diffuse, cool light source coming from the viewer's left (user's right), creating soft shadows on the viewer's right side of the torso. The hoodie must replicate this gradient: lighter teal highlights on the left deltoid/chest, fading to darker navy shadows on the right side. - **Color Calibration:** The source garment image has a warm/yellow cast from the room's incandescent lighting/bedding. This must be neutralized. The blue/teal hue needs to be color-graded to match the cooler, slightly lower-contrast lighting environment of the user's room to avoid a "cut-and-paste" sticker effect. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including the specific grooming of the beard, mustache, and jawline, must remain pixel-perfectly frozen. The neck texture above the clavicle must be preserved until it meets the new garment line. - **Body Integrity:** Strictly forbid any slimming or athletic tapering of the user's torso. The simulation must respect the user's natural shoulder width and chest dimensions, only adding the necessary bulk inherent to the hoodie's material thickness.