PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a heavy cotton-fleece blend hoodie. It possesses a high weight and low elasticity, meaning it should not cling tightly to curves but rather form structured, rounded folds. The surface is matte and light-absorbing, unlike the textured, slightly sheen fabric of the user's current yellow top. - **Key Features:** The silver central zipper, the dual white drawstrings hanging from the neck, the kangaroo pockets on the lower front, and the distinct ribbed elastic texture on the cuffs and bottom hemline must be preserved. The hood structure behind the neck is essential for silhouette accuracy. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The sleeveless user image requires generating volumetric long sleeves that follow the bend of the user's arms. The hoodie is a relaxed fit; therefore, it must add slight bulk to the user's torso and arms, contrasting with the current form-fitting top. The bottom hem of the hoodie must interact with the user's hands—since she is holding her current hem, the simulation should show the hoodie's fabric slightly compressed or bunched under her fingers at the waistline. - **Occlusion Handling:** 1. **Hair:** The user's long, wavy dark hair drapes over both shoulders and down the chest. This needs precise alpha-masking to ensure the hoodie is rendered *behind* the hair strands. 2. **Hands:** Both hands are positioned at the waist/hips. The garment must be masked out where the hands and wrists are located, ensuring the hands layer *over* the hoodie pockets/hem. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in an indoor environment with overhead ceiling lights (warm/neutral temperature), casting soft shadows downward. The source hoodie is lit by cool, flat studio lighting. The generated hoodie must adopt the warm color cast of the room, and shadows should be generated underneath the drawstrings, inside the hood area, and under the arms to match the user's lighting vector. - **Color Calibration:** The deep navy blue of the hoodie must be color-graded to reflect the ambient warm light of the room, shifting slightly towards a warmer dark blue tone to avoid looking like a pasted "sticker." PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head, including eyes, nose, mouth, jawline, and neck skin, must be strictly frozen and masked from alteration. - **Body Integrity:** The user's natural body proportions (waist width, hip width, arm thickness) must be preserved. The simulation must simply "clothe" the existing body volume, not slim or warp the user to match the source model's physique.