hi dave im using unreal engine 4 for the first time, and i have something to ask:
how do you change the skybox to night?
Create a sphere, input coordinates to 0,0,0, make the size 2000 on x,y,z, create a material that you want to be your sky texture and make it a two-sided material by clicking the little checkbox on the bottom left that says two-sided. Once you've done that, apply the material to the sphere, disable cast shadows on the sphere and disable it's collision. You should now have your own custom skybox.