Yay for me! To celebrate here are some screenshots from where I'm currently testing.
The Tortured King, one of the companions.
A mountain pass (a prefab)
Inside, infravision can be most useful....
Otherwise things look like this (and this area is "lit"), many dungeon areas are pitch black.
Like this.... (those glowing eyes belong to the Tortured King)
Exteriors are dark at night too.
Just in case you thought everything was pitch black....
it can be pretty during the day.