If the rendered effect picture has insufficient light, you can manually add supplementary lights. Supplementary lights can be added with one click in the rendering interface. The operation steps are shown in the screenshot as follows:

After completing the effect picture, it is recommended not to add lights first, but render directly, and then adjust the lights according to the effect of the rendered image. In the design of the effect picture, due to the different size and matching of each room, as well as the atmosphere effect to be displayed, the required light parameters are different. Automatic supplementary lighting is only for a basic supplementary lighting effect.