Having difficulty with lighting specific models

That’s an excellent resource, and I appreciate you being patient with me so far! However, I cannot seem to get the ceilings of anything to be as light as the surroundings. I know that surfaces not hit at all by the directional light are still made light blue by the skylight, but for some reason the ceilings stay very black.

The shadows guide you posted did offer me a lot of info for adjusting the shadows and I fixed a lot of other problems I was having, so I’ve just got this one last pickle to solve

also, is there anyway to enable these settings?