EA has released a video showing off the technical prowess of its Frostbite 3 game engine, with lots of shiny Battlefield 4 footage on show.
Much of the video focuses on how the engine ties together different elements of the world it's building. Noted, for example, is Frostbite handling wind animation on trees but also ensuring that clouds follow that same wind pattern.
There's also a little on how it makes eyes better and, of course, lots of 'splosions. Here you go: