the map design of the user modified computer-game Team Fortress (quake fortress, team fortress classic, TF2 from half-life series) has navigation: mirroring one

the map design of the user modified computer-game Team Fortress (quake fortress, team fortress classic, TF2 from half-life series) has navigation: mirroring one side of the map to the other side, applying 2 colours (on either side); at first the map confuses then "the brain" grows accustomed