high res. screenshot VS actual render

Hello there!
I am relatively new to UE and I get hard time to obtain a decent sharp archviz still image…
I have watched many tutorials about the AA settings and the console variables but somehow the
sharp image is not there … ( I use LUMEN _5.5.3)

The hi res screenshot is decent (2K_ screen percentage 100%_scalability cinematic):

but the render is blurry (2K):

and my settings are :


ps. the textures are pbr 4K
ps2. I get LOD issues in the render , I don’t understand why the grass next to the pool disappears (!)
ps3. materials are wip_ need work (tiling etc)

thanks in advance !