How can I fix the lighting flicker and color overflow in Onimusha 2 with my Huntkey Blizzard T620 Snow?

Night battles in Onimusha 2 were a mess; path tracing caused color overflow and screen tearing. I tried lowering the ray tracing quality from 'Path Tracing' to 'High', which improved speed but made the visuals look cheap and broken. It wasn't a viable solution. I used DDU to clean uninstall the driver, installed NVIDIA Studio Driver 560.94, and used the GamePP Shader Compilation Queue Manager to clear the 5.5GB shader cache. This reset the compilation queue. RTSS showed frame generation time dropping from 18-26ms to 10-13ms. 3DMark tests confirmed no rendering errors. The visuals are crisp now, and the set-up is stable for immersive gameplay.