So the Engine Fallout uses is a joke, modders can do better, I really hope they build a new game engine for FO4. Now a lot of people talk about how they'll just upgrade Creation Engine but why, the physics are lame and the gameplay mechanics are outdated. So I know its expensive to create a brand new engine but I think the next FO game should use the Frostbite engine, now its a great engine and is amazing at FPS, and it also looks great in third person. I think its time they ditch the game engine they've used forever and start new.
Now before you guys say that Creation is 10x better then the FO engine, if modders can make FO look better than Skyrim the it time for a new engine.