Step 7 The default light is too dark. You need to add more light sources by dragging the lamp icon to the preview box. Set its type to Omni.

默认灯光太暗了，需要添加更多的光源，将下面灯泡样的图案拖到预览图上。设置全光源。

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This Preview is invaluable when composing complex scenes that may typically combine multiple light sources with different colour temperatures.

这是非常宝贵的预览当组成的复杂的场景，可能通常结合多种不同的颜色温度的光源。

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Preview : street light or moon?

路灯还是月亮？

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