PHASE 1: VISUAL DECONSTRUCTION - **Fabric Physics:** The source garment appears to be a linen or linen-cotton blend. It possesses a "dry" matte texture with low reflectivity and high structural stiffness compared to the user's current knit top. Unlike the current stretchy pink garment, the new simulation must show rigid crumpling rather than elastic contouring. The fabric should exhibit a slight roughness/slub texture under close inspection. - **Key Features:** The asymmetric white floral embroidery along the placket is the primary focal point and must be warped correctly across the chest volume. The collar structure is crisp and must stand away from the neck slightly. The balloon/bishop sleeve gathering at the cuffs and the shoulder yoke gathers must be preserved. The high-low hemline (tunic style) is critical, particularly the longer back tail. PHASE 2: FIT & DRAPE SIMULATION - **Body Mapping:** Due to the user's seated side-profile pose, the garment physics must react to compression at the midsection. The front hem of the shirt will bunch significantly where the torso meets the thighs. The back hem, being longer, should naturally drape onto the brick ledge behind the user's hips rather than hanging freely. The sleeves are voluminous; gravity will pull the fabric downward at the triceps, creating a looser silhouette than the current tight sleeve, with folds accumulating at the bent elbow. - **Occlusion Handling:** 1. **Hair:** The user's long dark hair falls over the back and right shoulder; the brown shirt must be rendered *underneath* these hair strands. 2. **Bag & Hands:** The patterned bag on the user's lap and the hands resting on it create a complex occlusion zone. The lower front of the shirt must disappear behind the bag and hands, appearing to tuck or bunch naturally at that boundary. PHASE 3: ENVIRONMENT & LIGHTING - **Light Match:** The target scene features soft, diffuse outdoor daylight (overcast or late afternoon) coming primarily from the upper-left/open sky. The source garment is currently lit by studio lighting. The new render must eliminate the studio highlights and adopt the flat, ambient shading of the lake environment. Shadows should be soft and settle into the folds created by the seated posture and the fabric's linen stiffness. - **Color Calibration:** The source brown is warm and saturated. To match the slightly hazy, lower-contrast outdoor palette of the User Image, the brown shirt requires slight desaturation and a shift toward a cooler tone to harmonize with the blue jeans and grey/red brickwork. PHASE 4: IDENTITY PROTECTION - **Facial Lock:** The user's profile (jawline, cheek, ear) and the specific flow and volume of the hair must remain pixel-perfectly frozen. No retouching of the skin tone on the neck or face is permitted. - **Body Integrity:** Strictly forbidden to slim the user's arms or torso. The simulation must respect the displacement of the flesh caused by the seated pose (e.g., thigh expansion). The final silhouette should appear *larger* than the original image because the source garment is an oversized/relaxed fit compared to the fitted pink top.