FS2004 Grass/Dirt/Brick Runway Textures. New grass and dirt runways and taxiways for FS2004 - update. These new textures will completely change the look of your default grass and dirt runways and taxiways to be what the author considers to be much more realistic. Also alters what was the brick runway and taxiway textures to be a much darker color giving AFCAD2 designers a much greater oportunity to add different runway, taxiway and ground polygons. By Ian Thatcher.