How to stop flickering textures when entering Rattay in KCD II?

Entering Rattay for the first time was a total disaster; the flickering textures and visual fragmentation completely broke the immersion. I tried increasing my virtual memory to 64GB, but loading times actually increased by 3 seconds, which felt like a waste of time. I turned to the GamePP BIOS Load-Line Voltage Guide to bump the voltage from 1.25V to 1.32V and loosened tRAS to 42. AIDA64 showed memory latency at 88-112ns, and MemTest86 confirmed zero errors with temperatures stable at 48-54℃.