PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a cotton-blend fleece sweatshirt (likely heathered jersey knit). It possesses medium weight and high opacity with a matte finish. It should absorb light rather than reflect it, diffusing illumination softly across the surface. The material is pliable but structured enough to hold the shape of the ribbing at the neck, cuffs, and hem. - **Key Features:** The central chest graphic ("AUTHENTIC ESTD. Terrain JEANSWEAR 2000") with its specific script typography and color palette must be preserved without distortion. The ribbed crewneck collar structure and the distinct heathered texture (speckled visual noise) of the fabric are critical for realism. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The current target image features a bulky puffer jacket which artificially inflates the user's silhouette. The simulation must estimate the user's actual torso volume beneath the jacket to apply the sweatshirt correctly. The sweatshirt should drape naturally from the trapezius, falling closer to the body than the current jacket, with fabric bunching likely occurring at the inner elbows (cubital fossa) due to the relaxed arm position. The hem should settle at the upper hip, slightly covering the waistband of the jeans. - **Occlusion Handling:** The user's beard extends downward; the new crewneck collar must sit naturally beneath the beard line without clipping. The user's hands (visible at the wrists) must be segmented out and layered *over* the new garment's cuffs. The new garment must completely replace both the outer black jacket and the inner white t-shirt. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment is outdoor daylight with a strong, overhead sun source (slightly right-biased), creating high-contrast shadows. The studio-lit, soft-shadowed source garment must be relit to match this harsh, directional sunlight. Shadows should be cast downward from the chest area and beneath the armpits. - **Color Calibration:** The source image has neutral/cool studio toning. The target environment has warm sunlight and blue atmospheric fill. The pink/red hue of the sweatshirt must be warmed slightly to match the outdoor color temperature, ensuring it integrates with the ambient light bouncing off the grey asphalt and surrounding vegetation. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's entire head region—specifically the sunglasses, beard, nose, ears, and hair—must be frozen and pixel-preserved. The neck skin above the collarbone must remain unaltered. - **Body Integrity:** While the silhouette volume will decrease by removing the puffer jacket, the user's underlying anatomical shoulder width and torso structure must be respected. Do not slim the user's actual body mass; only remove the artificial bulk of the existing outerwear. The legs and jeans must remain untouched.