PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment is a heavyweight flannel shirt-jacket (shacket) with a thick, high-pile sherpa (fleece) lining. Simulation must account for significant fabric thickness and rigidity; it will not drape like a thin t-shirt. The outer flannel is matte and light-absorbent, while the silver snap buttons require specular highlighting. The sherpa lining must retain a textured, "bumpy" depth map rather than appearing flat. - **Key Features:** The complex green/mustard/brown plaid pattern must maintain alignment across seams (especially at the shoulders and pockets). The structural integrity of the collar, the chest pocket flaps with snap buttons, and the visible white sherpa lining at the neck/opening area are critical details that must be preserved. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's upright, arms-down posture, the jacket should hang relatively straight from the shoulders with a boxy silhouette. Given the thickness of the sherpa lining, a "volumetric offset" must be applied so the jacket sits slightly off the skin, simulating bulk. Fabric should stack slightly at the wrists and bunch minimally at the armpits. - **Occlusion Handling:** The user's full beard is the primary occlusion layer. The beard tip must be segmented and layered *over* the new jacket's collar and upper chest area. The turban (pagri) is completely separate and must not be clipped by the new garment's neckline. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target environment is a cinema lobby with warm, overhead artificial downlighting and reflections from the glossy floor. The source garment (photographed in natural, likely cool outdoor light) needs a temperature shift. The lighting model must cast soft, downward shadows under the pocket flaps and collar, consistent with the overhead sources in the cinema. - **Color Calibration:** The source garment's greens and yellows are currently neutral/cool. They must be color-graded with a warmer tint to match the ambient yellow/orange hue of the cinema lobby. The white sherpa lining must be dimmed slightly to match the exposure of the user's face, preventing it from looking unnaturally bright white in the indoor setting. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute freeze on the user's turban, forehead, eyes, nose, cheeks, and beard. The boundary between the turban and the forehead must remain pixel-perfect. - **Body Integrity:** The user has a broad shoulder build. The simulation is explicitly forbidden from slimming the torso or narrowing the shoulders. The jacket must adapt to his current size, replacing the bulky striped sweater without shrinking the underlying body volume.