This is what my skybox currently looks like (post processing disabled):
And this is what it looks like when “View Mode” is set to “Unlit”, which is what it’s supposed to look like normally:
The “Shading Mode” on the sky sphere material is set to “Unlit”, I would have thought that would make it look like the second image, but it doesn’t. I’m new to Unreal, so sorry if the answer is obvious to some people.