The images below will give you a look at the atmosphere, various environments, #weaponmodifications, and a character model.
Escape from Tarkov is looking rather solid, with quite a few ways to customize weapons in the game. The most recent developer videos provide a look at the various modifications along with Alpha gameplay.
Raw Alpha gameplay footage:
Alpha weapon customization demo:
Battlestate Games have not announced a release date for Escape from Tarkov, but it will be released on Linux, Mac and Windows PC at some point this year.