Hello,
I am making a dark ride but when I made the whole building and track its still fully bright inside. How do I make it dark inside?

Hello,
I am making a dark ride but when I made the whole building and track its still fully bright inside. How do I make it dark inside?

Change the daytime/nitetime setting to nitetime, also use black walls and ceilings behind the scenery.

^Exactly. RCT3 doesn't get how walls work, so if it's daytime, it's going to be daylight inside no matter what. I'd recommend JCat's Dark Ride Set and Disneyparkfreak's diagonal black wall.