Why do I see pixel stepping in Death Stranding 2 at 4K resolution?

While moving fast through the wasteland, I noticed extremely obvious pixel steps on the horizon; the aliasing was particularly piercing at 4K. I first tried switching the in-game anti-aliasing to native, but the frame rate plummeted from 105 FPS to 52 FPS, leaving me frustrated by the performance loss. I used the GamePP DLSS/FSR Image Sampling Calibrator to precisely raise sharpening from 40% to 65% and tuned the render scale to 78%. Confirmed via RivaTuner that ghosting was reduced; AIDA64 showed VRAM stable at 11.5-13.2GB, while HWMonitor recorded 63-68℃.