A racing sim that runs in a browser tab. LibreCorsa by KhazP does 500 Hz physics, a Pacejka style tyre with a 9 node thermal model, and force feedback over WebHID. No install. I want to know how the tyre model holds up at the limit.
KhazP/librecorsa
LibreCorsa – Browser-based F1 racing sim
I built a free, open-source racing sim that runs directly in your browser with zero install:
- 2026-style F1 car physics (500 Hz loop, active aero Z/X modes, ERS battery management, tyre thermals).
- Fan-made Rwanda circuit based on the proposed renders and local terrain elevation data.
- Works on PC with keyboard, controller, or steering wheel (including WebHID force feedback in Chrome/Edge).
- Serverless P2P multiplayer via copy-paste room codes.
Code is MIT-licensed. Still WIP, so feedback is welcome!
Code (MIT repo): KhazP/librecorsa
2 points
Side Project: Browser Based Racing Sim for Newly Proposed Rwanda GP
With F1 announcing the Rwanda deal this week, I wanted to share a side project I’ve been building for the last 3 days: an F1 sim that runs in your browser.
- 2026-style F1 car with ERS and active aero
- Fan-made Rwanda circuit (not the official layout, but a copy of the proposed renders)
- Keyboard, controller or steering wheel support
Play: khazp.github.io
Code (public repo): KhazP/rwanda-f1-2026-sim
It’s a free, open-source non-commercial fan project. Some of the 3D models and mod assets I used are licensed for non-commercial use only. Still very WIP, so feedback is welcome!
3 points · 7 comments
Racing sim in Three.js: 500 Hz vehicle physics, GPU tyre deformation and physics simulations
Side project, 3 days in. Everything runs client-side: Next.js static export, Three.js for rendering, Web Audio for the engine sound.
Rendering: AgX tone mapping, a PMREM sky environment, a car-tracking sun shadow, bloom, clearcoat paint, and tyres that deform on the GPU (contact patch flattening, sidewall bulge) driven by the physics.
Physics: a separate fixed 500 Hz loop with 2 kHz substeps for the tyres and suspension.
Play: khazp.github.io
Code (public repo): KhazP/rwanda-f1-2026-sim
10 comments
🔗 Play: khazp.github.io
💻 Open source: KhazP/rwanda-f1-2026-sim
- F1 car: Sim Dream Development (Modified, Changed)
- GT3: Ddiaz Design (sketchfab model), TRR (physics/sounds)
- Track textures: Romeo Gagliotti
Full credits in the repo (this is a non-commercial project)
4 likes · 6 views
Mentions
A racing sim that runs in a browser tab. LibreCorsa by KhazP does 500 Hz physics, a Pacejka style tyre with a 9 node thermal model, and force feedback over WebHID. No install. I want to know how the tyre model holds up at the limit. KhazP/librecorsa
LibreCorsa – Browser-based F1 racing sim I built a free, open-source racing sim that runs directly in your browser with zero install: - 2026-style F1 car physics (500 Hz loop, active aero Z/X modes, ERS battery management, tyre thermals). - Fan-made Rwanda circuit based on the proposed renders and local terrain elevation data. - Works on PC with keyboard, controller, or steering wheel (including WebHID force feedback in Chrome/Edge). - Serverless P2P multiplayer via copy-paste room codes. Code is MIT-licensed. Still WIP, so feedback is welcome! Code (MIT repo): KhazP/librecorsa
Side Project: Browser Based Racing Sim for Newly Proposed Rwanda GP With F1 announcing the Rwanda deal this week, I wanted to share a side project I’ve been building for the last 3 days: an F1 sim that runs in your browser. - 2026-style F1 car with ERS and active aero - Fan-made Rwanda circuit (not the official layout, but a copy of the proposed renders) - Keyboard, controller or steering wheel support Play: khazp.github.io Code (public repo): KhazP/rwanda-f1-2026-sim It’s a free, open-source non-commercial fan project. Some of the 3D models and mod assets I used are licensed for non-commercial use only. Still very WIP, so feedback is welcome!
Racing sim in Three.js: 500 Hz vehicle physics, GPU tyre deformation and physics simulations Side project, 3 days in. Everything runs client-side: Next.js static export, Three.js for rendering, Web Audio for the engine sound. Rendering: AgX tone mapping, a PMREM sky environment, a car-tracking sun shadow, bloom, clearcoat paint, and tyres that deform on the GPU (contact patch flattening, sidewall bulge) driven by the physics. Physics: a separate fixed 500 Hz loop with 2 kHz substeps for the tyres and suspension. Play: khazp.github.io Code (public repo): KhazP/rwanda-f1-2026-sim
🔗 Play: khazp.github.io 💻 Open source: KhazP/rwanda-f1-2026-sim - F1 car: Sim Dream Development (Modified, Changed) - GT3: Ddiaz Design (sketchfab model), TRR (physics/sounds) - Track textures: Romeo Gagliotti Full credits in the repo (this is a non-commercial project)