DirectX 11 renderer has been added to the game. It is available as an option in Graphics settings and players can choose between the old DX9 and the new DX11. The main advantages of the DX11 renderer are better game performance and visual look of the models. The renderer is still in early stages of development, so some bugs and visual issues may be present.
The DX11 renderer of the game uses physically based rendering (PBR), which helps to achieve a more realistic look, especially for metallic surfaces. For modders, it means that they will have to create a new set of textures for DX11. We will be slowly replacing old placeholder models with reworked assets. Five updated blocks are released in this update (Beacon, Gyroscope, Warhead, Projector, Spotlight).

Additionally, players will now have the option to rotate a static station by switching to rotating mode (via pressing the 'B' button). The station created in the Station rotation mode will not allow blocks separated from it to be merged again.

https://www.youtube.com/watch?v=OJweMz-IXJ8

Full list of new features and fixes: http://forum.keenswh.com/threads/7360751

DX11 modding guide:
https://www.youtube.com/watch?v=_qCi5uq2VUo
http://steamcommunity.com/sharedfiles/filedetails/?id=450823575