Has anybody found an actual solution for this? I am having the same issue and changing anti-aliasing mode does not help. TSR is the best option as it has minimal flickering, but still very much noticeable. I have spent DAYS messing around with all different render settings, material settings and lighting/reflections. absolutely nothing has worked. Even installed unreal on a friends pc who has never had it before and when i loaded up a basic level and dropped some trees in. Boom same thing, flickering like crazy. Any ideas would be greatly appreciated, I cant find anything online that has actually worked.