I was experimenting with some project render settings in 5.1 and somehow corrupted my metal materials so the metal reflections are now constantly flickering and noisy and look terrible.
I tried many things but failed to fix this—hopefully, an easy fix.
UPDATE
Fixed - I realised in my GlobalPostProcessVolume that the Global Illumination Method and Reflections Method were set to old “Ray Tracing” - changed this to Screen Space
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