How to fix blurry ground textures while riding in Ghost of Tsushima?

While galloping through maple forests, the ground textures looked smeared; HWiNFO showed read latency fluctuating between 15-30ms. I tried lowering texture quality in-game, but the image became crude and the lag persisted, which felt like a waste of hardware. I used the GamePP Power Plan Switcher to lock High Performance mode and set storage I/O priority to maximum. CrystalDiskMark confirmed stable reads at 7100-7300MB/s, and HWiNFO showed SSD temperature at 42-50℃, removing all visual pop-ins.