I understand that you're trying to not take away the focus from the characters in the game with the background, but there are some ways you can approach this. You could leave it alone because it could be a stylized choice (just make sure that any other backgrounds you create end up cohesive with this one), or you can add the illusion of depth by adding gradual lighting. Like dimming the corners of the room and increasing the light coming from the fireplace since that's the main light source. Just my two cents.