Why is my RTX 5060 dropping frames in dense 4K clouds?

Flying through cumulonimbus, I saw textures blur and FPS plummet to 32. I tried lowering texture quality to Medium, but the graininess was unacceptable. Using GamePP DLSS/FSR Image Sampling Calibrator, I switched from Quality to Performance and set sharpening to 65. GamePP Hardware Sensor Page showed VRAM usage stabilizing at 84-88%. Frame generation intervals dropped to under 2ms, and FPS held steady at 58-62. This fix saves the immersion.