how to achieve photorealism in cinematics?

Im not sure if this is posted in the right section, but the thing is this, I know the basics of UE, I know how to use megascans, quixel bridge, set the lights, etc. but when I do my final render it looks like a cheap videogame, so any tips to achieve photorealism like in “rebirth” or something like that? btw my pc specs are no problem, I have 16 gb ram, rtx 2060.