That graph is 3 years old, released before even Unreal Engine 4 was publicly available. A lot has happen since. What you refer to as "quality" is relative. Just as with any rendering if you are not competent to pull it off then it will looks bad regardless of if it is offline of real-time. Putting stuff into v-ray or…
My constructive criticism: I saw your original 2D art thread a while ago and though it looked fine. People were critiquing a lot of stupid things in my opinion. I though it looked interesting. I even skimmed this seeing some negative stuff here and there and I thought the artwork looks cool, so I went back and re-read. I…