How to stop distant texture flickering in Horizon Zero Dawn?

While observing machines in the Forbidden Forest, the distant vegetation textures flickered eerily, which felt like an unforgivable flaw. I excitedly tried enabling 'Extreme Performance' mode in the drivers, but while FPS rose, the flickering actually increased. I then used the GamePP DLSS/FSR Image Sampling Calibrator to switch to Fixed Quality and set sharpening to 70%. GPU-Z showed VRAM frequency converged to 20.5 GHz, and AIDA64 confirmed temperatures stabilized at 62-68℃ with VRAM usage at 11-13GB.