XRRC

Build a tiny track.
Make a huge mess.

A pocket-sized dirt rally for WebXR, phone, and desktop. Bring your own pit crew.

1:10 scale Backyard spec

Pit board

Set your heat

Language

Room code

Use the same code to race with friends.

Course map

01 Backyard Rally Garden dirt 02 Alpine Pass Snow + switchbacks 03 Desert Run Sand + canyon 04 Neon Harbor Docks after dark 05 Sakura Sprint Blossom garden 06 Lunar Circuit Craters + low light

Vehicle bay

Rally Buggy 4x4 Moto Tank Plane Heli Racer 1 Racer 2 Racer 3 Taxi Police Coupe Rally GT

All-rounder

Balanced pace, grip, and recovery for any circuit.

Speed
Launch
Handling
Stability

Dream lab

AI-built by Tripo while you wait for friends to join.

Invent a vehicle

Theme the map

Track kit / Launch rampCatch air O Stunt loopGo vertical A Street kitCones + lights

Race rules LapsCircuit length RivalsSolo opponents + Steering assistGentle course correction

Multiplayer relay Solo

Tailscale Serve URL

Private rooms work when each player can reach this tailnet device.

Leave blank for a solo heat.

Running pre-race checks.

XRRC / LAB.LIAMBROZA.COM WebXR + Three.js + WebRTC

Rally car 00 km/h

Race time 0:00.000 Best --:--.---

Solo heat 1 cars

Lap 1 / 3 Sector 1 / 4

On course P1 / 4

Drift boost

Standings

Scan a flat surface, then tap to drop the track

Drag to drive

WASD or arrows to drive Space / Shift altitude R to reset Keyboard ready

Race control

Yellow flag

The clock and every racer are stopped.

Official timing

Heat complete

P1 / 4 0:00.000 Personal best

Lap	Time

XRRC // Pit pass

Call in your pit crew

Scan the code or send the room pass.

#BACKYARD Scan to join

Room link

Email Text WhatsApp

The pass carries this room setup. Private relay access still controls who can join.