Balanced night cycle

As many players have noticed over the years, Cyberpunk 2077 is having a rough night. It doesn't last long. Observing players may have noticed that sunlight in the sky lasts until 10 pm, and returns, it seems, to 2:30 am.

In fact, things are much worse. It turns out that in Cyberpunk 2077 there is never such a time of day when the sky finally ceases to darken and there comes a stable total darkness. In the real world, of course, real darkness lasts many hours. In the Cyberpunk 2077 setting, total darkness must last for more than five and a half hours.

In detail:

Fortunately, although the sky in Cyberpunk 2077 never enters a stable period of darkness as such, there is a small window between 23:45 and 1:00 am where the actual changes are probably too thin to notice without measuring instruments. These ~75 minutes are the only time in a day/night cycle in Cyberpunk 2077 that qualifies as nocturnal.

Canonical surroundingsCyberpunk 2077: Watsonville, CA - a short drive south of San Jose. Canonical date: June 12 was seen on in-game monitors. By setting the time and location, we can determine the exact moments for the different phases of the day/night cycle:

Reality: In the game:

Astronomical twilight: 3:55 - 4:38 (43 minutes) ~1:00 - ~1:30

Other twilight: 4:38 - 5:47 (69 minutes) ~1:30 - 4:39 am

Sunrise: 5:47 - 4:39 am

Duration of the day: 880 minutes 882 minutes

Sunset: 8:27PM 7:21PM

Other twilight: 8:27PM - 9:36PM (69 minutes) 7:21PM - ~11:15PM

Astronomical twilight: from 9:36PM to 10:19PM (43 minutes) ~11:15PM to ~11:45PM

Night time: from 10:19 pm to 3:55 am (336 minutes) ~11:45 pm to ~1:00 am

Duration of night time: 336 minutes ~75 minutes

Observations:

• By default, the daytime time measured from the first to the last glimpse of the sun is almost accurate.
• Although it doesn't matter, in-game clocks show sunrise and sunset times earlier by about 1 hour and 7 minutes.
• The entire dusk period, including the last flashes, should last no more than 113 minutes, but in the game this period lasts twice longer.
• As mentioned earlier, the "night time" in the game - the concept is hazy, but it definitely lasts no more than 75 minutes, while should last about 336 minutes.
• The pre-dawn twilight in the game suddenly becomes brighter at 2:00 a.m., leaving a smooth curve.
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Solution:

• This set of curves was designed to correct both dusk and night duration and to account for other abnormalities in the game's dusk behavior, such as the above-mentioned phenomenon where brightness is instantly accelerated at 2:00 am.
• Records of sunrise/sunset timelapses have been carefully analyzed to ensure that the end result matches reality.
• The total duration of a 24-hour period is essentially the same as a completely flat curve.
• In particular, the daytime is absolutely flat, so the sun moves across the sky at a fixed speed throughout its appearance.
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Explanation of the difference between vanilla and realtime:

The unmodified vanilla set of curves is not flat. This means that even if you're playing Cyberpunk 2077 in a completely unmodified state, the time will still undetectably accelerate and slow as the day goes on. Because these changes are not balanced with each other, vanilla's "24-hour day" at a velocity multiplier of 1 actually lasts about 25 hours 24 m.

In the conventional version of this fashion, the above-mentioned time difference is carefully imitated, so the 24-hour period in fashion is the same as in vanilla. But I understand that having a real 24-hour day can be helpful for players who want 24 hours to last exactly 24 hours. That's why I provided a version of fashion called "Realtime". Using this version of fashion, along with a tweek that makes the speed multiplier equal to 1, will create a real 24-hour day. Tweek, also known as "Realtime", is in additional files.

Regarding the duration of the day:

The duration of one vanilla day is about 3.5 hours, and that is how long a day in this fashion. If the duration of one day seems too short (or too long), you can adjust it using a tweak using TweakXL. I provided three examples of tweaks as additional files: one halves the length of a day, another doubles it, and the third doubles the length of a day to real time*. If you want to set a value that best suits your needs, simply edit the text file that is in those files. The vanilla value is "8", higher values speed up the day, lower values slow down. (My personal value is 3.5).

These tweaks work independently of the curve settings and can be used with or without the main mode.

*Tweak "Realtime" sets the speed multiplier to 1. With the usual version of mainstream fashion, one day lasts the same as in vanilla with such a multiplier, that is, about 25.4 hours. If you're hoping for a 24-hour day, take a tweet of "Realtime" and a version of mainstream fashion "Realtime".

Caution:

This mod is a solution to the problem of the inaccuracy of the duration of dusk and night. But because it achieves this by changing the duration of these time intervals, in-game hours between sunset and sunrise can be noticeably incompatible. At the same time, as already noted, even in the vanilla set of curves there are dips and depressions, which means that the vanilla clock is accelerating, then slowing. There is no way to fix the night cycle and keep the clock in check. Naturally, faster or slower clocks will not introduce any strange bugs or instability - there is already a lot of mods for curves.

Installation:

All files you download, including additional tweet files, should be installed in the usual way: unzip them to the Cyberpunk 2077 folder.