PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a structural, medium-weight fabric, likely corduroy or heavy cotton twill. It possesses high bending stiffness and low shear, meaning it will not cling to the body but rather maintain its own boxy, architectural shape. Light reflection should be matte with subtle specular highlights on the fabric ridges/texture to convey the tactile quality of the weave. - **Key Features:** The gathered "puff" shoulders and elasticated/tapered cuffs are structural necessities. The two large front patch pockets, the specific spacing of the Minnie Mouse recurring pattern, the central button placket, and the spread collar must be preserved with high fidelity. The "H&M" label inside the neck should generally be obscured by the user's neck/hair in a realistic fit. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Unlike the current tight tank top, the target jacket is intended to have an oversized, relaxed fit. It should sit away from the user's torso, creating negative space between the fabric and the waist. The shoulders of the jacket should extend slightly beyond the user's natural acromion process to accommodate the puff sleeve design. The hemline should extend past the navel, likely covering the waistband of the beige joggers. - **Occlusion Handling:** The user's shoulder-length curly hair is the primary occlusion layer; the hair tips must be segmented and layered *over* the jacket collar and shoulder area. The user's left hand (viewer's right) is resting near the hip; the jacket sleeve should naturally drape straight down, likely partially obscuring the wrist, or bunching slightly if it encounters the hand/hip contact point. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user image features soft, diffuse studio lighting originating from the front-left. The rendered jacket must generate self-shadowing under the collar, beneath the pocket flaps, and within the deep folds of the gathered sleeves. A soft contact shadow must be cast by the jacket hem onto the beige trousers to ground the garment. - **Color Calibration:** Both the jacket and the user's current trousers are in the beige/cream color family. To prevent visual merging, the texture map of the jacket (twill/corduroy grain) must be emphasized to differentiate it from the smoother cotton of the trousers. Ensure the cream tone of the jacket remains warm to match the user's skin tone warmth. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including the complex curly hair geometry, jawline, and neck, must remain completely frozen. The existing neckline of the tank top must be erased and replaced by the jacket collar without blurring the skin texture of the neck. - **Body Integrity:** Strictly forbid any slimming or warping of the user's hips or legs. The user's natural stance and hip width must be preserved. The jacket adds bulk; the simulation must reflect this added volume rather than shrinking the garment to fit the current skinny silhouette.