機械臂場景背景替換

Background modification prompt: Replace the desktop in the original video with a standard office workstation desk. Replace the overall background with an office environment featuring blinds and metal filing cabinets. The perspective and proportions of the new desk must completely match the original shot. The desktop material must naturally inherit the light and shadow projection from the original video; the edge shadows and highlight direction must strictly match the original scene's light source. The depth of field blur for the background blinds and filing cabinets must align with the original video's focus, maintaining the original spatial depth. During this process, the original video's camera motion trajectory, the robotic arm's complete motion timing and speed, the relative positions and spatial occlusion relationships of other items in the frame, and the overall lighting atmosphere must remain 100% unchanged, ensuring the replaced elements seamlessly integrate with the original footage.