One last update, but you can consider this one optional.
It's an updated timecycle. I wanted to keep the bright blue midday of the original game with the gradient sunrises and sunsets, as well as the darker nights I originally released this mod with. This one also comes with updates to make rainy, cloudy and foggy weather a little more consistent with their corresponding times, and includes updates to atmospheric and object lighting. If you're happy with the current timecycle, feel free to skip this, but I encourage you to try both to see which you prefer as I think this one is a lot better in general and has a pretty heavy impact on the look of the game.
The first link comes with every file you need for the mod, and the second is just the timecycle file itself.
For the first link, follow installation instructions in the readme. They're the same as they always were.
For the second link, just extract the .rar and drop the timecyc.dat file into your data folder to overwrite the old timecyc.dat. Download (full) Download (timecycle only)