PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a lightweight cotton chambray or denim blend. It has a matte finish with low reflectivity but distinct structural rigidity compared to knits. The fabric physics engine must simulate a "crisp" drape that holds creases at the sleeve cuffs and button placket, rather than clinging to the skin like the user's current jersey knit polo. - **Key Features:** The all-over white palm tree print must be preserved without warping the pattern logic. Critical geometry includes the open "camp collar" (distinct from the user's current polo collar), the visible vertical button placket, the stitched hem on the short sleeves, and the curved bottom hemline which implies an untucked fit. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** The target user has a similar athletic build to the model but with slightly broader shoulders. The new shirt must sit wider on the user's shoulders than the current polo. Gravity will cause the woven fabric to hang vertically from the pectorals and shoulder blades, creating a slight "tenting" effect over the midsection, unlike the fitted polo. The sleeves should be looser, ending mid-bicep with a structured circular opening. - **Occlusion Handling:** 1. **Hair/Beard:** The user's curly hair and full beard interact with his neck area. The new collar must be rendered *behind* the beard and the ends of the hair at the nape of the neck. 2. **Watch:** The wristwatch on the user's left arm is well below the sleeve line but must be masked to ensure no artifacting bleeds onto it. 3. **Tattoo:** The tattoo on the right inner forearm must remain completely uncovered and unaltered. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The user is in a soft-lit indoor environment with warm, diffuse lighting coming from the front-right. The source image has cool, high-contrast studio lighting. We must soften the shadows on the blue shirt and introduce a warm tint to the white palm trees to match the ambient room temperature (reflected from the beige curtains). - **Color Calibration:** The source indigo/blue needs to be desaturated slightly and shifted toward a warmer hue to integrate with the room's color palette. Shadows within the shirt folds must be soft black/brown, not the sharp grey of the studio image. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** Absolute freeze on the user's facial pixels from the chin up, including the beard, ears, and full hairstyle. The neck skin tone must be seamlessly blended where the new open collar reveals more skin than the polo. - **Body Integrity:** The user's muscular structure (shoulder width, arm girth, and torso volume) is immutable. The simulation must fit the cloth to the body, not warp the body to fit the cloth. No slimming or smoothing of the user's natural silhouette is permitted.