勘景同时记录一天中不同时间的光向、环境噪声、电源和可控背景。现场照片要带上拍摄方向和时间，回到剪辑或生成阶段才能判断素材是否能拼接。 Scout sound and light together: note sun direction, ambient noise, power, and controllable backgrounds at different times. Photograph the direction and time so later shots can be matched in edit or generation.