PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a ribbed knit cotton-blend (likely cotton/spandex). It is matte with low reflectivity but has high textural contrast due to the vertical ribbing. The physics engine must treat this as a "high-stretch, high-friction" material that clings to the body rather than hanging loosely. - **Key Features:** The vertical rib structure is critical and must follow the curvature of the torso. The deep U-neckline and deep armholes (racerback style cut) must be preserved. The small logo tag on the bottom hem must be retained if the tucking style allows, or removed if the garment is cropped at the waist. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** This is a high-difficulty transfer because the target is wearing a bulky puffer jacket. The simulation must "deflate" the volume of the jacket to map the vest directly onto the user's skin/undershirt layer. Since the source is a sleeveless vest and the target has long sleeves, the simulation must generate/inpaint the user's bare arms and shoulders which are currently hidden by the jacket. The vest must stretch across the pectorals and relax slightly at the midsection. - **Occlusion Handling:** The user's hands are interacting with the jacket near the abdomen/chest. These hands are a hard occlusion and must be segmented out and layered *over* the new navy vest. The jacket itself acts as a massive occlusion; if the goal is to wear the vest *under* the jacket, the jacket remains the top layer. If the goal is to *replace* the jacket, the jacket pixels must be fully removed and replaced with background/skin generation. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target image features soft, diffuse, cool-toned outdoor lighting (overcast sky). The source image has warm, indoor artificial lighting. The navy vest must be color-graded to remove yellow casts and match the cool blue ambient occlusion of the outdoor scene. Shadows on the ribbing must be soft, not harsh. - **Color Calibration:** The source navy blue is currently illuminated by warm light. It needs to be shifted towards a cooler, desaturated navy to match the "blue hour" feel of the target photo. The black/white points of the vest must match the contrast range of the user's beard and beanie. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's beard, mustache, eyes, skin texture, and the blue knit beanie must be strictly preserved. The jawline shadow needs to be maintained. - **Body Integrity:** The user appears to have a broad, solid build. The sleeveless vest should not artificially slim the waist or exaggerate muscular definition beyond what is natural for the user's implied physique. The neck thickness must remain consistent with the head size.