In version 1.1, a sleeping bag was added.
When you get a sleeping bag, you can use it anywhere (see Important notes and known issues), but be careful, since all effects will continue to affect Skif, for example, increased radiation, bleeding, and there may be a situation when he dies during the sleeping. Also, the game does not block the use of the sleeping bag during an emmission or a battle. By default, about 8 hours of game time are skipped. If you use a mod to increase the duration of the game day, less time may be skipped.
An example of use can be seen in the animation:
Important notes and known issues!
1. At some point, the game can block the flow of time, in which case the sleeping bag will not work. Most often, this happens at certain plot points. For example, during the prologue, time is fixed.
2. If after using a sleeping bag you can't open your inventory, then do a jump or open your PDA, after which the inventory will be unlocked. This is a bug of the vanilla STALKER itself.
3. If after using the sleeping bag it does not return, then most likely the quest system, which is responsible for its mechanics, is broken. The quest can be restarted using the console command: XStartQuestBySID SleepingBagMechanics (to use the console you need to install UETools - Developer Console . Debugging).
Since version 1.2.2 if your system is not supported by any mod that unlock console than you should wait when the next emission end and sleeping bag mechanic (quest) will restart automatically.
4. To change the sleeping time when using any mod that increases the length of the game day you need to:
a) unpack the mod (pack/unpack tutorial)
b) find the SleepingBagMechanics.cfg file in the QuestNodePrototypes folder
c) (for v1.2) in this file you need to find the line "ConsoleCommand = XSetTimeSpeed 600" (by default, line #144) and change the number 600 as many times as you have increased the length of the game day (for example, for x3 game day you need to set the value to 1800). Don't forget to save the changes!
c) (since v1.2.1) in this file you need to find the line "ConsoleCommand = XSkipTimeHours 0.333" (by default, line #162) and calculate new value with next formula: [ingame hours to sleep]/[CoreVariables.RealToGameTimeCoef]. Don't forget to save the changes!
d) pack the mod back
e) have a fun!