Use the uploaded video as the primary source. Preserve the subject's identity, facial features, hairstyle, body proportions, expressions, lip sync, body movement, timing, and camera motion exactly as in the original video. Automatically replace the subject's clothing with reference cloth i provided. Automatically relight the subject so the lighting perfectly matches the new environment. Analyze the direction, intensity, color temperature, and softness of every light source in the background and recreate that lighting on the face, skin, clothing, hair, and body. If the background contains warm indoor lights, apply warm realistic key lighting. If the background contains blue ambient lighting, add natural blue fill light. If sunlight enters from windows, recreate realistic sunlight with matching shadows. If the environment is dark, adjust exposure naturally without making the subject look artificially bright. Apply physically accurate global illumination so the subject appears naturally integrated into the new scene. Generate realistic contact shadows beneath the feet, environmental bounce lighting, ambient occlusion, soft reflections where appropriate, and subtle color spill from surrounding walls and objects onto the subject. Match the white balance, exposure, contrast, saturation, dynamic range, and color grading to the environment automatically. Ensure skin tones remain realistic while adapting naturally to the lighting conditions of the scene. Preserve perfect edge detail around hair, fingers, clothing, and transparent objects. Eliminate halos, matte artifacts, flickering, ghosting, or segmentation errors. Maintain stable tracking throughout the shot. If the camera moves, reconstruct the environment in stable 3D space with realistic parallax. Background elements must remain perfectly anchored with zero sliding, drifting, or warping. Render in ultra-photorealistic cinematic quality with realistic fabric simulation, natural facial lighting, accurate shadows, premium HDR rendering, ray-traced global illumination, subtle depth of field, and professional commercial color grading suitable for high-end advertising. Automatically adapt every visual element—including outfit, lighting, reflections, shadows, exposure, color grading, and environmental interaction—to match whatever background is used, ensuring the subject always looks like they were originally filmed in that location. Negative Prompt: low quality, AI artifacts, cartoon look, unrealistic clothing, face distortion, incorrect lighting, inconsistent shadows, color mismatch, flickering, warped background, floating subject, halo around hair, oversaturated colors, blurry textures, unnatural skin tones, duplicate limbs, poor compositing, unstable tracking, plastic-looking fabric, unrealistic reflections. keep video fast as reference video no change in pace “