The further away we get from the sun, the sunlight gets visibly weaker. In the case of Uranus, the sunlight is about 400x weaker than on Earth.
If we keep the star-light values consistent with the other renders—and open up the aperture, we get to see a softly lit Uranus with bright stars in the background.
[1]: Dreams of Blauw are any form of crystallised thought based on honest expression. Sometimes they linger a shade of blue in your after-image.