Several collections of concept art published on ArtStation Atomic Heart. The materials can hardly be called full-fledged concepts, but they can be used to evaluate the environment of the game and various models.
You can also notice that initially the twins looked more like their real prototype, only then they changed their hairstyle and hair color.
Authors in the selection: Blacksteinn Studio, Corbax Studio, Oleg Aleinikov and SURFSIDE 3D Studio.
Atomic Heart available on PC, PS4, PS5, Xbox One and Xbox Series.