Ask the hero for help, the middle of the 3dmax ceiling is very dark, how can it be like one in the s

The method of answering just upstairs is also possible, but the curtains of your scene are relatively thick. If you just ask to brighten the middle of the light pool, you can hit a VR surface light in the middle of this light pool and shine upwards, turn off the cast shadows, affect highlight reflections, and affect reflections, and only turn on affect diffuse reflections, invisible, and ignore light normals!

Put two VR lights on the window, one white and one blue.