PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a high-pile "teddy" fleece or faux sherpa material. It is thick, voluminous, and highly absorbent of light (matte finish). It must not exhibit specular highlights like satin or leather. The simulation must simulate "sub-surface scattering" to capture the soft, fuzzy depth of the fibers. - **Key Features:** The tie-dye pattern (neon green/deep blue) must remain continuous across seams. Essential structural details include the white drawstrings (physics required), the front kangaroo pocket, the elasticated ribbed cuffs, and the thick, bunched hood structure behind the neck. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the material thickness, the hoodie must add volumetric bulk to the user's silhouette, sitting slightly higher on the traps and wider on the arms than the current thin shirt. The sleeves should exhibit "stacking" (bunching) at the wrists as the garment appears slightly oversized. - **Occlusion Handling:** The user's hands are clasped at the lower abdomen. This is a critical occlusion zone. The hoodie's lower hem and potentially the bottom of the kangaroo pocket will interact here. The fabric must appear to flow *behind* the clasped hands, bunching slightly above the wrists due to friction/collision. The hands must be segmented and layered *over* the rendered garment. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is under strong, top-down artificial indoor lighting (evident from the sheen on the forehead and the shadow angle on the door). The hoodie needs to cast a soft shadow downwards onto the white trousers. The fleece texture requires high-contrast ambient occlusion to show the depth of the pile under this direct overhead light. - **Color Calibration:** The user's environment has a warm, yellow-cast indoor tungsten tone. The bright, cool studio white balance of the source hoodie must be warmed slightly (shifting white points towards yellow/orange) to blend into the room's atmosphere, preventing the neon colors from looking fluorescent or "glowing." PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head region, from the neck upwards, including the jawline, ears, and tied-back hair, must remain completely frozen and pixel-identical to the source. - **Body Integrity:** The user's underlying skeletal structure and hip width must remain unaltered. The visual widening of the upper body must be solely attributed to the thick fleece fabric, not an alteration of the user's actual anatomy. Do not slim the waist or arms.