- AC Rally’s V0.6 replace hides vital back-end change
- Unofficial mods trigger host of recreation crashes
Supernova Video games Studios has addressed neighborhood complaints following Assetto Corsa Rally’sV0.6 replace.
Many gamers have reported recreation crashes after updating to the most recent construct, which the developer has largely pinned on the presence of mods.
Though AC Rally shouldn’t be strictly open to modding but, many gamers have managed so as to add new co-drivers, liveries and different functions through unofficial means. Though these have largely been transferable between new builds up thus far, V0.6 represents a much bigger step ahead for the sport’s underlying know-how than earlier than.
“0.6 upgraded AC Rally to Unreal Engine 5.6 — a serious engine model soar, not a small patch,” the developer stated in an official assertion.
“Unofficial mods are constructed by unpacking/repacking the sport’s .pak / .ucas / .utoc recordsdata with instruments like UnrealPak, FModel, and FMOD Financial institution Instruments. These archives aren’t engine‑agnostic — their inner format (serialization model, knowledge layouts, asset registry) is tied to the engine model they had been packed towards.
“A mod packed for the pre‑0.6 construct appears malformed to the 5.6 executable: it might get skipped, load with lacking/mismatched knowledge, or hit invalid knowledge mid‑load — which reveals up as a crash. It is a normal aspect impact of Unreal Engine upgrades, not an intentional block on mods; 0.6 added no new mod‑detection or DRM”.
In addition to new vehicles, a photo mode and an official customized livery system, V0.6 had subsequently additionally signalled the implementation of a brand new recreation engine, shifting from Unreal Engine 5.4 to 5.6, a serious back-end change with severe knock-on results for mod packaging.
It’s not, as Supernova careworn, a approach to scupper third-party modding.
Why Unreal Engine 5.6?
The explanation Supernova upgraded to UE 5.6 is easy:it offers much better optimised graphics and CPU performance.
On a subjective observe, I discovered that AC Rally ran poorly on my mid-range system within the final couple of builds, however V0.6 has been a revelation compared. My recreation now maintains a silky-smooth 60fps with most graphics settings, whereas earlier than it will stutter worse than a Rally1 car through a water splash. Anecdotal proof suggests many gamers are having an identical expertise (though there are of course all the time exceptions).
A extra secure graphics platform may present builders the headroom required so as to add extra superior visible prospers (like ray tracing, for instance), in addition to present a stable base for official VR assist in future.
Within the meantime, gamers with unofficial mod content material have been urged to take away it to cut back crashes. Likewise, mod creators ought to replace their work to adjust to UE 5.6 to make sure compatibility.
“That is precisely why we’re constructing official modding assist: content material and tooling constructed for that pipeline is designed to remain secure throughout engine upgrades,” defined Supernova, which went on to state that V0.6’s customized livery activation is step one towards wider modding assist.
And for a recreation that’s crying out for extra rally phases, modding will likely be extraordinarily vital to its long-term success.
Supernova Video games Studios’ official assertion, eleventh September, 2026
Hey everybody, since 0.6 shipped, we’ve seen experiences of mods made with third‑occasion instruments not loading, or crashing the sport. Right here’s what occurred and what your choices are.
What modified
- 0.6 upgraded ACR to Unreal Engine 5.6 — a serious engine model soar, not a small patch.
Why previous mods break
- Unofficial mods are constructed by unpacking/repacking the sport’s .pak / .ucas / .utoc recordsdata with instruments like UnrealPak, FModel, and FMOD Financial institution Instruments. These archives aren’t engine‑agnostic — their inner format (serialization model, knowledge layouts, asset registry) is tied to the engine model they had been packed towards. A mod packed for the pre‑0.6 construct appears malformed to the 5.6 executable: it might get skipped, load with lacking/mismatched knowledge, or hit invalid knowledge mid‑load — which reveals up as a crash. It is a normal aspect impact of Unreal engine upgrades, not an intentional block on mods; 0.6 added no new mod‑detection or DRM.
What you are able to do
- Taking part in with mods: if the sport crashes on startup or on loading a automobile/observe, take away mods one after the other to seek out the wrongdoer. Solely re‑allow mods their creator has confirmed as up to date for 0.6 — assume something unlabeled is incompatible. Maintain a backup of your previous mod folder earlier than testing.
- Making mods: re‑extract property and regenerate mapping recordsdata towards the present 0.6 construct, then repack with a UnrealPak/FModel model that helps UE 5.6’s format — older software variations will misinterpret it. Double‑test knowledge desk/struct overrides, since a stale override is a standard crash trigger. Please label up to date mods “0.6‑suitable” so gamers aren’t guessing.
What we’re doing
- That is precisely why we’re constructing official modding assist: content material and tooling constructed for that pipeline is designed to remain secure throughout engine upgrades, so a future model bump gained’t silently break your work the way in which a uncooked engine model change does. The customized livery assist in 0.6 is the primary piece of that.
- Thanks on your endurance and for every little thing the modding neighborhood places into our recreation.