How to fix over-smoothed textures and stutters in The Callisto Protocol?

The open world looked like a watercolor painting, and the stutters were unbearable. I switched DLSS to Balanced mode, but the blurring got worse while FPS only rose by 10. I used the GamePP DLSS/FSR Image Sampling Calibrator to raise sharpening from 50 to 75 and set render resolution to 100%. RivaTuner showed a massive improvement in effective render pixels. The VRAM bandwidth saturation dropped from 700GB/s to a stable