OGSR-Engine VS SRP

No, CoC uses CoC-Xray, which is a fork of CoP engine, OGSR uses OGSR-Engine, which is a fork of SoC engine.

Maybe try the OGSR engine (the engine itself i mean, not the standalone OGSR mod that use that engine) : https://github.com/OGSR/OGSR-Engine

OGSR project, there is a github ill post a link in this comment if it works https://github.com/OGSR/OGSR-Engine

For more info or troubleshooting, you can join their Discord here.

You can get links for the most recent version (which includes full English) from their Discord.

You can always try the OGSR engine and see if that works with for example Shadow of Chernobyl.

Try this mod as stated above https://github.com/Decane/SRP

Clear Sky is the cheapest of the three probably because it's the most jank. Play this one second. You need the SRP mod, and I recommend the Alternative Ballistics, feasable stealth, and decreased AI grenade spam sub-mods. It's a prequel to SoC but also spoils the ending. Early Game Advice: 1: When you leave the Swamp and go to Cordon for the first time, just go back to the swamp and take the northern entrance to Cordon instead of the one the game leads you to, you WILL get killed by the machine gun every time. 2:There's several moments where you will lose ALL of your money with no way to get it back, one is completely unavoidable, so don't worry too much about having money early on There's a faction war system but I never bothered much with it, it was more annoying than anything.

To enjoy clear sky either install the sky reclamation project https://www.moddb.com/mods/srp or ABR mod https://www.moddb.com/mods/abr-cs-mod

I then bought CS and played it for like 1 hour without mods. I disliked it so far. I still have to give it another go, but the different UI and changed mechanics pained me. Recently someone told me about https://www.moddb.com/mods/srp and I think I will give it a try in half a year.

Sky Reclamation Project(SRP) is same type of mod but for Stalker Clear Sky. You can find it here.

Install the Sky Reclamation Project mod pack before even thinking of properly starting a new game*, You'll save yourself a lot of frustration and actually be able to get through the 3rd of the last act without the slide-show effect & save-corrupting CTD's. The free-play option disables the ending cinematic though, so keep that in mind.

SRP - Most of it already included in the Enhanced modpack as far as I know,

Check out Absolute Texture Packs. As for bugs - ZRP for Shadow of Chernobyl, SRP for Clear Sky.

In CS and CoP, there is a Lua script named object_collection.script. A simplified version thereof will be in the next version of the SRP. In CS, this script allocates task entity identifiers and squad identifiers in a sustainable fashion by re-using identifiers where possible. Perhaps equivalent logic could be implemented in the engine for generic entity ID allocation.