Đổi nền ảnh chân dung

Prompt tạo ảnh

Use the uploaded portrait as the exact source. IDENTITY LOCK: do not change the facial features, face shape, skin tone, skin texture, hairstyle, hair length, body proportions, pose, expression or clothing in any way. TASK: replace only the background with [MÔ TẢ NỀN MỚI]. Relight the new background so its direction, intensity and colour temperature match the light already falling on the subject, then blend the transition so the edge looks photographed rather than cut out. Refine the hair boundary strand by strand, keeping wispy strands intact with no halo and no smearing. Add a subtle believable shadow or ambient occlusion where the subject meets the new environment. Match the depth of field of the new background to the focal length implied by the portrait, keeping the subject perfectly sharp. Preserve the original grain and colour response so both layers share one photographic look. DO NOT: smooth or retouch the face, slim the body, brighten the teeth or eyes, change the crop, add text or watermark. Output at the original resolution, photorealistic.