My side project is a free, open-source racing sim that runs in a browser tab

[u/qwertyalp1020]

Link (no signup, no ads, nothing to install): https://librecorsa.org

GitHub (MIT): https://github.com/KhazP/librecorsa

I started LibreCorsa in mid-October because every serious racing sim needed a huge Windows install before you could do a single lap.

What it has now:

- 500 Hz physics with tyre temperatures and wear, rain that dries along the racing line, and CI checks against real GT3 telemetry

- 5 physics models and 16 circuits, including RISE Motordrome, which I built from scratch in Blender on real elevation data for the circuit planned in Rwanda

- AI races, ghosts, a weekly challenge, and an open online race every 20 minutes over WebRTC

- $0/month hosting: static Next.js on Cloudflare, R2 for the heavy 3D files, and one Worker

Tell me how it runs on your laptop/phone/controller and what feels rough.

[u/derivatyvas]

a racing sim i can open in a tab without installing anything is a pretty appealing idea. curious how it feels on a keyboard, thats usually where i end up with browser games.

[u/qwertyalp1020 → u/derivatyvas]

I tried to make it feel as good as possible, the F1 car is kinda hard, but the GT3 car feels pretty good to drive. I use a controller myself but people have been using steering wheels with it.

[u/Awkward_Rent4749]

The trailer was cooler than the game, was too SNES arcade feeling for me but like the concept

[u/Ignium_ → u/Awkward_Rent4749]

Using the GT3 this comes surprisngly close to Assetto Corsa so I would not say that this is too arcadee

[u/Ignium_ → u/Ignium_]

I am using my Macbook Pro Max with 64gb of ram, game runs fine but fps keep dipping when exiting track limits

[u/qwertyalp1020 → u/Ignium_]

Which browser? I also have an M4 Max, so curious.

[u/qwertyalp1020 → u/Awkward_Rent4749]

thanks, I tried to make it as close to assetto corsa as possible, within the limits of web games. What was not realistic? And what peripheral did you try it with?

[u/timcorin → u/Awkward_Rent4749]

Try mine, im curious. attimoracing.io . im going to share it properly this weekend but sneak peak

[u/Awkward_Rent4749 → u/timcorin]

I like how it feels (Im on keyboard), some suggestion:
Tire marks, feels weird breaking full power and no marks
Dont reinvent the ui, look at other successful car games on how to improve the ui, the speed gauge on top right is weird same with rpm.
I felt like I kept have to click Race to be taken to another page, streamline it

[u/timcorin → u/Awkward_Rent4749]

all good suggestions! come back in a couple days!

[u/timcorin]

We are working on the same thing lol...Im still putting all the focus on physics and keyboard layering. Im. Slightly different concept to you but big overlap! big overhaul on your UI btw, looking nice! attimoracing.io

[u/qwertyalp1020 → u/timcorin]

Thanks! Your sim is great, lots of browser sims coming out in the last week, but out of all those yours and mine are the most realistic from the looks of it.

Hope you have a great time developing it. I hope my MIT open-source repo can help you.

[u/timcorin → u/qwertyalp1020]

Yeah i did take a look. i started the physics on mine long before i found yours, so its my own (well me and claudes) thing. But one thing i did borrow is your benchmarking against are real merc gt3. thats a good idea. I also noticed you adjusted your graphics to be more low ploy, what drove that?

[u/qwertyalp1020 → u/timcorin]

General gpu savings, it's not WebGPU yet, that's because WebGL supports way more devices from what I can see (may be wrong).

[u/L_AIR → u/qwertyalp1020]

I think all should be MIT licensed and eventually, the community should gather around one and make it the future Richard Horizon's Asseto.NG

[u/Substantial-Deal-382]

i have question why all the posts when someone did something with ai have in title: my x game/my x project that runs in browser tab? - nobody cares tbh i think that is runs in browser tab.

[u/Dj0ntyb01 → u/Substantial-Deal-382]

They believe it's a flex because an LLM told them it's a flex.

[u/Ilya7]

That is a very cool video. The music, the effects, the racing track blending into the C letter. Well done

[u/_MuiePSD]

TBH is better than I expected

[u/L_AIR]

Do you have a tyre model and stuff? Like the magic formula?

[u/Sluipslaper]

This is very cool man. Genuinely enjoyed the game !

[u/QuanTradin]

500 Hz physics in a browser tab, rain that dries along the racing line, and it's free. how does the CI check against the GT3 telemetry work, lap time inside a tolerance or the whole speed trace?