How to fix texture flickering with 4K MODs in Red Dead Redemption 2?

At 4K Ultra settings, muddy textures flickered rapidly, breaking the immersion. I tried forcing 'Maximum Performance' in the driver panel; although I gained 6 FPS, the flickering actually increased, which was incredibly frustrating. I used the GamePP Shader Compilation Queue Manager to clear 7.5GB of cache and adjusted voltage offset to +0.02V. 3DMark tests showed the rendering error rate dropped from 2.5% to 0%, and AIDA64 confirmed GPU temps at 62-68℃.