Battlefield 4 footage was PRE-ALPHA
http://slumz.boxden.com/f13/battlefield-4-footage-pre-alpha-1904421/
On the subject of the first Battlefield 4 gameplay video, which was released earlier this week, Bach explained: "
What you saw is pre-alpha - it's not the final game or anything. We are lacking a lot of optimisation. Without going into detail about what it could look like on a lower spec machine or a higher spec machine, we will have the scalability to bring the most out of any piece of hardware.
"
The demo is the visual target of what we want the game to look like, and when I say visual target I don't want people to confuse that with rendering pictures that you could never create in the actual game - when we create our visual targets a big part of that is to make it realistic, as in you will be able to run it on a machine that you can buy.
"
We've seen visual targets that are pre-rendered or running on machines that are designed for showing off technology - this is the game. [Single-player producer] Tobias was playing the game in the Frostbite engine with the content that we're using to build the game.