Design custom tracks for
Assetto Corsa & rFactor.
Sketch a circuit, get instant analysis, and export race-ready AI data — racing lines, track boundaries, speed targets, and pit lanes. From idea to driving in minutes.
Track imported into sim — screenshot coming soon
The problem
Building custom sim tracks shouldn't take weeks
Creating track mods from scratch means learning 3D modelling, writing AI files by hand, and hours of trial-and-error to get racing lines right. Most ideas never make it off the drawing board.
How it works
From sketch to sim in three steps
Design your circuit
Click to place points and shape your track. Use the satellite map to trace real roads or create a fantasy layout from scratch.
Analyse and refine
Get instant scoring on safety, overtaking, and fun. Run lap simulations across GT3, Formula, and road car classes to validate your design.
Export and drive
One-click export to Assetto Corsa (.ai) or rFactor 2 (.aiw). Drop the files into your sim's track folder and you're on track.
Export details
Race-ready data for your sim
Assetto Corsa
.ai binary + CSV data
- Optimal AI racing line computed from lap simulation
- Left and right track boundary distances
- Speed profile hints from physics-based simulation
- README with modding instructions included
rFactor 2
.aiw waypoint file
- Full AIW waypoint data with racing line and sectors
- Pit lane path with separate waypoint chain
- Speed targets and braking points per waypoint
- Left and right wall distances + elevation data
Also exports to OpenDRIVE (.xodr), 3D formats (glTF, FBX, OBJ, Blender), and more.
In action
Design it here, drive it there
See what tracks designed in RacetrackDesign look like inside your sim.
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Track designer view
Designing the circuit layout in RacetrackDesign
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Imported into Assetto Corsa
The same track loaded and driveable in AC
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AI racing line in rFactor 2
AI drivers following the exported racing line
Why sim racers choose us
Stop learning modding tools. Start designing tracks.
Minutes, not weeks
Hand-writing AI files takes 20+ hours. RacetrackDesign generates race-ready exports from your layout in seconds. Iterate faster, test more ideas.
Physics-based AI lines
Racing lines computed from proper lap simulation with braking, cornering grip, and acceleration — not just centreline offsets. AI cars drive realistically.
Validate before you build
See safety scores, overtaking potential, and lap times before spending hours on 3D modelling. Kill bad layouts early, double down on good ones.
Export everything
Beyond sim exports: 3D models (glTF, FBX, OBJ, Blender), heightmaps, OpenDRIVE for driving simulators, SVG, DXF, and full PDF reports.
Get started
Design your first track for free
Free accounts get unlimited track designs with instant analysis. Upgrade to Pro for sim racing exports, PDF reports, and 3D formats.
Pro is just $19/year — less than one month of iRacing.