how do I change precision / zbuffer


I am designing a level, but this flickering is happening on multiple objects, how do I increase precision? It is not happening, when I am close to the object, it is not z-fighting, it is happening with a basic material too, I tried increasing near clipping plane distance (30) and r.gbufferformat5, streaming pool size0 (infinite),
where should I be looking to solve this problem?

I have already found the problem, it was the virtual lightmaps, after turning it off, everything is workig just as expected