Concept sketches are created early in a project in order to decide on a final, cohesive image for each of the characters and locations. These are often varied in appearance to create multiple choices for the team and always undergo several revisions.
Color tests are concept images presented in several variations side by side and are used to select the best color pallette for a particular character. Additionally, they allow the designers to formulate and maintain a color theme that will be used throughout the entire game.
The following are various images that were used in the planning of the game and within the game to provide backstory. The map is expected to change quite a bit before release, but it helped get the team on the same page during production.