昏暗室内样本用背景实用灯提供暖色亮点，主体保持柔和对比。先把主体曝光稳定，再让背景灯只承担层次和色温，避免背景亮点抢走脸部信息。 A dim-room sample uses a warm practical light as a background accent while keeping soft contrast on the subject. Stabilize subject exposure first, then let the practical light provide depth and color without stealing facial attention.