Going in-depth with Nintendo's augmented reality Mario Kart RC car - Ars Technica

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• Man, now I want a real-life hover-clown-car RC toy.

  Nintendo

• This underwater stage even affects the sound design for the game.

  Nintendo

• I believe this is the first Mario Kart game where you could say "Look out for that ottoman!"

  Nintendo

• Retro chic.

  Nintendo

• The virtual gate hazards can be arranged on the left, right, or center of the gate.

  Nintendo

The toy industry has given us plenty of radio-controlled cars that are modeled after the Mario Kart franchise. But the $100 Mario Kart Life: Home Circuit, announced last month, promises to be the first to integrate such a toy car with an augmented reality camera and attendant Switch game experience.

While we haven't gotten any hands-on time with Mario Kart Live: Home Circuit yet, we were able to participate in a recent livestream demo of the RC car/AR app combo ahead of its planned October 16 release. What we saw doesn't quite match up to a full-fledged Mario Kart game, but it looks like it could add a lot of creativity and imaginative play opportunities to the standard RC car experience.

On your mark...

The demo walked us through the Mario Kart Live setup process, which starts off by using the camera on the Kart to scan a QR code found on the free downloadable Switch app (that app won't work at all without the Kart). With that scan, the Kart and Switch are connected directly via Wi-Fi, without the need for any router or live Internet connection.

Elbow room

How much space you need for Mario Kart Live largely depends on which speed class you choose to race, which also affects the physical speed of the Kart itself. At the lowest 50cc class, Nintendo says a "small bedroom" is enough space. For 150cc though, you'll want a room at least 10ft x 12ft, and you'll want even more for the fastest 200cc class.

Those spaces don't have to be empty, but you do need enough room for the Kart to navigate and for gate placement. The Karts themselves should be able drive on any "flat-ish" surface "as long as it's not 1970s shag carpet," a Nintendo representative told Ars. Small bumps are OK, but jumps or tall vertical rises could mess with the AR system.

Nintendo says the Wi-Fi connection can be maintained for about 30 feet between the Kart and the Switch, and it recommends a maximum play space of five meters squared for that reason. And while the Kart and game sound like they could technically work outside, the Nintendo rep said the company "does not advocate outside play" for either.

When you put the Kart down, you get an over-the-shoulder view of what the camera sees on your Switch screen (either docked or in handheld mode, standard or Switch Lite). Nintendo isn't discussing specifics of the streaming resolution/frame rate of this setup, but a Nintendo representative said he hadn't seen any latency between the Switch controls and the physical movements of the Kart itself.

The camera's positioning means you don't see the actual physical Kart from this view. Instead, you see your Kart represented as an animated 3D model at the bottom of the livestreamed camera view. This can lead to some lively interactions, like when Mario playfully gets your attention by knocking on the "camera's" glass.

Get set...

With the connection established, you set up your course by simply driving around your room; wherever your Kart goes, the virtual track will follow at a uniform width. The only physical requirement is four fold-out cardboard AR gates, each about three times the width of the Kart itself. You have to use all four of these in designing your course (no more, no less), and the Kart has to roll under each one in order, though you can loop back through a gate multiple times before moving to the next one.

You can make your course as simple or as complicated as you want between gates, adding zigzags, loops, intersections, or long straightaways to your heart's content. But the gates are the only strict requirement when navigating the course later; the game itself offers no penalty for driving off the course you lay out at any point.

Grab some friends

Mario Kart Live supports local multiplayer for up to four people. Each racer needs their own Kart, though, and there are only two racer designs currently (Mario and Luigi). That could cause some confusion on the physical course.

You're driving a physical Kart, though, so you can set up walls and barriers on the side of your virtual course to help encourage or force players to drive the "right" way. There's also a "smart steering" option for racers that helps automatically keeps the Kart on track.

"You're playing a game, and it's up to you to make your own rules," a Nintendo representative told Ars Technica. "In multiplayer, though, you're definitely going to get called out [for cutting corners]."

...Go!

With your course built, you can race through a simple Grand Prix mode that takes you through the basic track three times, each with different environmental hazards and visual themes (snow, rain, underwater, lava, 8-bit, Rainbow Road, etc.). While you set up the layout of the road itself, in this mode the game automatically puts out customizations including boosts, item boxes, and coins (used to unlock cosmetic options, not to increase your top speed). The modification are intended to make each race in the three-race series a bit harder, with the usual Mario Kart point-scoring for your speed and placement.

It takes a licking

Nintendo says you don't really have to worry about your Kart running into normal obstacles like table legs, chairs, or walls; the Karts themselves are durable enough to take such collisions at speed with nothing more than "some scuffs here and there," a Nintendo rep said. While the game discourages this kind of physical damage by making you lose in-game coins, in general there's an "expectation you'll hit something, turn around, and go back."

In Explore mode, you can add a bit more virtual customization to the gates themselves, choosing from a variety of hazards or boons when you drive under them. The most interesting of these was a Magikoopa effect, which mirrors your camera view of the course (and thus the real world around it) until you hit it again. There's also a Time Trial mode that lets you race against a ghost version of your best time and tracks the exact positioning of your Kart in that race.

In single-player races, computer-controlled Koopalings (and Bowser Jr.) serve as computer-controlled opponents. This being Mario Kart, those virtual opponents can affect your Kart with a variety of items. This means real-world effects on your physical Kart, too; a Red Shell or Piranha Plant gate will stop your Kart temporarily, while a Sandstorm or Magnet Gate actually make your Kart drift left or right briefly. And yes, you can give your Kart a physical speed boost with a mushroom (or by holding a drift for the requisite time).

While the course-customization options don't seem deep enough to really emulate a full-fledged Mario Kart game, Mario Kart Live still looks like a fun way to bring the basic concepts of the series into the real world. We're looking forward to getting some hands-on time with it soon.

Listing image by Nintendo

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Going in-depth with Nintendo's augmented reality Mario Kart RC car - Ars Technica
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