Sharp noise shadow artefacts on AI

[argosurvivors]

Describe the bug
Sharp light artefacts are appearing on AI stalkers. This is due to shaders. Once I placed shaders from Stalker Anomaly this error was fixed, it became very subtle.

To Reproduce
Steps to reproduce the behavior:

1. Start the game
2. Approach any AI stalker during daylight and look at their clothes area to spot shadow artefacts

Expected behavior
Shadows should be less pronounced without sharp rectangular spots

Screenshots, videos

BugTrap error report
Please, add a crashreport if you have it. It should be located in _appdata_/reports folder

Desktop (please complete the following information):
OpenXRay Release build 9605, May 26 2025 (Windows 64-bit, shared)
Nvidia GTX 1060, DX10 high video settings

Additional context
Adding modified shaders can fix this error, they can be included in additional gamedata folder for Clear Sky

[argosurvivors]

I have found the cause of these noise artefacts in both Call of Pripyat and Clear Sky.
In Call of Pripyat If the SSAO is set on default the error is present.
If I select manually HBAO for Nvidia in my case then the artefacts are gone.

In Clear Sky I entered these values from COP in debug console:

r2_ssao st_opt_high
r2_ssao_blur off
r2_ssao_half_data off
r2_ssao_hbao on
r2_ssao_hdao off
r2_ssao_mode hbao
r2_ssao_opt_data on

They are saved into user ltx. After restarting the Clear Sky game the artefacts were fixed.
You gave me the idea for this when you said that sun ray stripes are caused by not being able to select SSAO mode in Clear Sky.

The fix would be for the engine to recognise if you have Nvidia or AMD and chose right mode. The current default SSAO does not recognise.