How do I fix texture pop-in and VRAM overflow in Ghostwire: Tokyo?

Scene transitions in Ghostwire: Tokyo were painful, with texture loading taking 8 seconds and VRAM overflowing. I tried increasing VRAM pre-allocation, but it dropped my FPS to 61. I needed a better sampling strategy. I used the GamePP DLSS/FSR Image Sampling Calibrator to switch from auto to manual. 3DMark showed VRAM usage dropping from 14.5GB to 12.8GB. This finally let me backup my progress without lag.