Why is my fog rendering through unlit textures?

I am working on a remake of Slope for fun, and am using the built-in fog (whatever is in the lighting window) to hide far away platforms and make them load in more smoothly. I also have some obstacles on those platforms that have textures with unlit shaders, and now all of a sudden, fog is rendering through those objects. This started happening after I imported the Unity Particle Pack, which mentioned resetting the project settings, but I did not expect it to break the fog effect. Is there some setting I need to change, or if this is just a bug that I can't fix, is there an alternate fog I can use?

(By the way, in these screenshots the fog is 40x just so you can see it clearly)