How to stop textures flickering in Kingdom Come II?

Entering Rattay for the first time was a letdown as the stone walls flickered like a broken TV, totally killing my immersion. I tried lowering texture quality in the game settings, but the image just became a blurry mess and the flickering didn't stop. I used the GamePP Hardware Sensor to spot VRAM temperature spikes and increased the VRAM frequency offset by +100MHz with a voltage bump. VRAM bandwidth hit 880 GB/s per AIDA64, core temps sat at 65-72℃ per GPU-Z, and VRAM temps stabilized at 52-58℃ per HWiNFO.