Assetto Corsa stores a car as a folder with a cryptic name like ks_mazda_mx5_cup. Multitap turns those folders into a catalogue with proper names, classes and regions, so the launcher shows Mazda MX-5 Cup under Cup and the leaderboards can filter by class. This page is where that catalogue is built and tidied. Changes are pushed to every connected rig automatically.
How content gets into the catalogue
There are two routes, and most venues use both. Any car or track that records a lap is added on the spot, with a best-guess name and class. And you can pull your content in from your sims to fill in everything properly before the first lap is ever driven.
The Content from your sims section appears when the Assetto Corsa tab is selected. It compares the content reports your online sims have sent with your catalogue and tells you what is missing, for example Sim 1 has 4 cars and 1 track that aren't in your catalog. Show the list names them, and Pull from sims asks those sims for the catalogue files and pictures. The section shows each sim's progress while the pull runs and ends with a line such as Added 3 cars, 1 track, 12 pictures. If no sim has reported yet it says so and sends you to press Refresh in Content Sync first. Cars and tracks that are in your catalogue but that no sim listed in its last report are gathered under no longer on any sim, with Remove all for the ones you have taken off your rigs; their laps keep their names.
Under Advanced: upload content by hand you can still read your content in yourself. It updates existing rows and works when no sim is online.
| Control | What it does |
|---|---|
| Select Folder or drag a folder | Scans a copy of your Assetto Corsa content folder in the browser. Only the small description files inside each car and track are read; no game files are uploaded. Shows a summary and an Apply to Database button. |
| Select ZIP or drag a ZIP | Uploads a ZIP of your content and reads the same description files, plus tyre compound data from each car. Apply with the same button. |
Applying an upload never overwrites a name, class or region you have edited by hand. Those rows are counted as skipped in the summary, but they still receive liveries, tyre data and previews from the scan.
Traffic maps
For a map to have traffic, the server needs that map's AI line: a few small files from the map's ai folder that tell the AI cars where the lanes are. Your rigs send these by themselves. Leave a rig switched on with the Multitap Collector running and it sends the AI line of every map it has that the server is missing.
The Traffic maps panel, under the upload controls, lists the maps the launcher offers for traffic, each with a Map column, a Traffic column and an Offered switch. Maps that look like traffic maps are marked suggested and switched on for you; switch off any you don't want. A line above the list says how many maps the launcher offers right now and how many more will show up once their AI line arrives. Race circuits are folded away under Racing lines only with a count: almost every race track ships an AI racing line for opponents, but they are not road maps with traffic, so they stay off unless you switch one on.
| Status | What it means |
|---|---|
| ✅ Ready | The server has the AI line, and the status says how many lanes it found, for example 3 lanes. The map can run traffic. |
| ⏳ Waiting for a rig to send it | No rig has sent it yet. A rig that has the map sends it within about ten minutes. |
| ⚠ Not found on your rigs | Your rigs have checked and none of them has the AI line. The row names the rigs that checked and when. Send it by hand. |
To send a map by hand, press How do I fix this? on its row. The Send a map by hand box below fills in the map's folder name and walks you through it: on a rig, open File Explorer, go to the game's content\tracks folder, find the folder with that name, and drag the whole folder onto the drop zone (or click the zone and choose the folder). Only the small AI files are sent, so even a huge map takes seconds. A green tick confirms each map. Drop the map's own folder, not the ai folder inside it; the box tells you if you got it wrong.
A map only appears in the traffic track list while it is switched on, with its Offered switch here or the Traffic switch in the tracks table. Until its AI line arrives it is listed greyed out with No AI line yet in the Groups traffic drawer and in Traffic mode on the Launcher page, and can't be picked.
Where classes and regions come from
Classes and regions are not made up per venue. They come from VenueLaps, which publishes one list for every game, so a GT3 car is called GT3 at every Multitap venue and boards, emails and VenueLaps all agree. For Assetto Corsa the classes are Classic, Cup, Drift, Fun, GT2, GT3, GT4, Kart, NASCAR, Open Wheel, Prototype, Rally, Street and Touring. Tracks sit in one of four regions: Americas, Europe/Africa, Asia/Oceania and Fantasy/Unknown.
A line above the tables says where the list stands, for example Classes and regions come from VenueLaps (updated 14:02). If VenueLaps can't be reached, the page keeps using the last list it saved and says so. On a brand new venue that has never loaded the list, class and region editing waits until it arrives; everything else on the page works as usual.
Check against VenueLaps compares everything the venue has stored with the current list: car classes, track regions, and the classes and regions saved in leaderboards, quick starts and saved lineups. It lists each value that doesn't match, with what it will become, for example a region spelled Europe becoming Europe/Africa. Apply these changes makes them all at once, after a confirmation, and keeps a copy of every file it changes beside the original. When everything already matches, the check says so.
The tables
Two tabs, Cars and Tracks, share a toolbar: a dropdown to filter by class or region (including Unclassified and No Region), a Needs Review toggle, a search box, and sortable column headers. Needs Review shows the cars without a class or with a class that isn't on the VenueLaps list, and the tracks without a region or with one that isn't on it. A count shows how many rows match. Pages hold a hundred rows.
Cars
Each row has the folder name, an editable Display Name, the car's classes and a save button. Each class shows as a chip; click a chip's cross to remove it, and pick from Add class to give the car another one from the VenueLaps list. A car can belong to more than one class. A car with no class shows an Unclassified chip. A value that isn't on the list, left over from before, shows as a warning chip marked not a VenueLaps class: remove it and pick a class from the list. Save sends only what you changed.
When a car is first seen, Multitap suggests a class from the car's own description and name, and keeps the suggestion only when it is on the VenueLaps list. Anything it can't place is left unclassified and shows up under Needs Review and on the Dashboard. An unclassified car is still launchable: on the rig it sits in its own Unclassified group of the car picker. It does not appear on class-filtered boards and does not trigger class-based emails. A class you set by hand is kept when content is scanned again.
Tracks
Each row has the folder name, an editable Display Name, a Region list, a Traffic switch and a save button. The region list offers No region and the four VenueLaps regions; a region left over from before that isn't one of them is marked not a VenueLaps region until you pick another. Regions group the track list on the rig and drive the Region filters in Groups and Leagues; a track with no region is filed under Fantasy on the rig. Scans set the region from the track's country where VenueLaps knows the country; you can override it, and a region you set by hand is kept when content is scanned again. The Traffic switch marks a track as available for traffic sessions and saves immediately; the map can only launch once its AI line has reached the server (see Traffic maps).
With the Traffic switch on, the row also holds the map's traffic profile:
| Control | What it does |
|---|---|
| Speed | Venue default, Cruise 60, City 80 or Highway 110, in km/h. This is the speed a traffic session uses when its Traffic Speed is left at Map default. Venue default uses the default speed from the Traffic card in Settings. |
| Two-way | Runs traffic in both directions. It only has an effect on maps whose AI line has lanes going the other way. |
| Save icon | Saves the profile. A note confirms Traffic profile saved. |
Tracks with several layouts have a row per layout.
ACC and iRacing
The ACC and iRacing tabs come pre-filled with the cars and tracks those games ship, since their content does not change the way Assetto Corsa's does. Names, classes and regions are editable in the same way. There is no upload section for these games.
What the rigs see
Every save and every scan sends an update to connected rigs. A rig sitting on the car step refreshes its grid in place. Preview images for cars, liveries and tracks are synced to each rig when its launcher starts, so the customer's wizard shows photographs rather than folder names.