I want to know what are the steps to achieve production photorealism lighting, rendering, and the best scene quality visually. To where it looks like real life. if anyone can help it would be great
Hi!
I would spend a lot of time searching for tutorials… reading the answerhub and the forum… and practice a lot! 
The most importants are: lightmap uvs, lightmass settings, postprocess!
Good luck! 
Pointing some basic explanation?