Reto-Moto has published an interesting look at the recent deployment of the "Engine Room" update. Improvements have been made in the way rendering place and how the engine utilizes CPU cores. As the result, around 20% frame-rate improvement has been noted by the tester pool. In addition, the team announced that they ended support for DirectX 9 based GPUs.
Our community has been very active and helpful in testing the new render on our prototype servers. We have seen a 20 percent framerate improvement on average, and 70 percent of the players that took part in latest test of the new render reported either a better or much better performance
Other notable pieces that the update brings to the game are a higher resolution UI, crisper, more saturated maps, less pixel flicher, the option to try out the DirectX 12 experimental setting and translation to Brazilian Portuguese.
You can find out the full text of the update on the Heroes & Generals official site.