ACNG 0.3.0 beta

ACNG freeroam beta for BeamNG.drive 0.39.4. Source 9ed0801 (recorded in the build manifest).

This is a pre-release. It is playable, but features are still changing and bugs are expected.

What's new since freeroam-2026-10-09:

• AC-style tire model (turn Tires on):
  • Each tire has inner, middle and outer tread temperatures. A tire cooked on one edge loses grip even when its average looks fine.
  • Each tire has an ideal hot pressure. Running far from it costs grip, so cold tires and low pressures are slower.
  • Sliding a cold tire grains it, and the grain wears off again once the tire is driven in its window. Sliding a hot tire blisters it, and blisters stay until fresh tires.
  • Driving off tarmac picks up dirt that costs grip back on the road until it wears off.
  • New tires need a short scrub-in.
  • Tested in game: 28/28 checks on a skidpad. Dirt and road feel are not tested in game yet.
• The ACNG Tires app shows the three tread temperatures, pressure against the ideal, and GRAIN / BLISTER / DIRT tags.
• Minimal HUD: ACNG Control is a small translucent ON/OFF pill (Advanced opens the full panel). ACNG Tires is four transparent tiles that only show while the tire model is on.

262 Python checks and 10 UI test suites passed.

Install:

1. Close BeamNG.
2. Download acng-freeroam.zip below and put it in your BeamNG mods folder (Windows: %LOCALAPPDATA%\BeamNG\BeamNG.drive\current\mods, or use "Open user folder" in the BeamNG launcher). Remove or disable any older ACNG zip.
3. Start BeamNG, add the ACNG app in UI Apps, spawn a car and turn the master ON.

Master and every feature start OFF. BeamNG's own suspension, deformation and damage stay in charge.

No maps, cars or other game assets are included.

acng-freeroam.build.json lists the SHA256 of the zip and every file in it.