Tracks take place on a variety of surfaces in a number of different locales. Races take place in locations like the dusty outback of Australia and through the countrysides of Europe. DiRT absolutely nails the look of each and, thanks to a great lighting engine, really gives each its own unique atmosphere. There is also a bit of interaction between your car and tracks; you can break through fences, signs and even small trees. In addition, your car will pick up dust and water particles as your race.
If that isn't enough, you can also experience it all through a first-person viewpoint where you really are in the driver's seat (you'll even see your hands on the wheel). The viewpoint really brings something different to races, though it can sometimes make it hard to see -- especially when the vehicle's rollbar is in the way.
Audio presentation is scaled back, at least when compared to the visuals, though it accomplished what it needs to. There isn't much in the way of a soundtrack; music only plays during replays and as you navigate through front-end menus. Travis Pastrana, the current Rally America champion, is your host throughout the game and will offer explanations of race types as well as words of encouragement and disappointment. Christian Edstrom also offers advice on tracks and serves as your co-driver during races. You'll hear him offer navigational directions during some races, as well as a load of cheesy dialogue before and after each race.