Project Motor Racing
Steam News 28 November 20255mo ago

Patch Notes – Version 1.5.0.1

Patch Notes – Version 1.5.0.1 Online & Multiplayer Added a new warning message when the game client is outdated and cannot play online. Fixed a missing callback that caused version-mismatch connection failures. Fixed an…

Update log

Full Project Motor Racing update

The complete published notes, normalized for clean reading and source attribution.

Extracted changes

13 fixes12 additions19 changes3 removals
  • Gameplay
  • Fixes
  • Workshop
  • Server
  • Performance
  • UI and audio
addedOnline & MultiplayerAdded a new warning message when the game client is outdated and cannot play online.
fixedOnline & MultiplayerFixed a missing callback that caused version-mismatch connection failures.
fixedOnline & MultiplayerFixed an issue where selecting a lobby on a different backend prevented selecting other lobbies - lobby details are now fetched only when attempting to join.
fixedOnline & MultiplayerFixed a Lua error caused by incorrect parameter order during failed Social Event matchmaking.
fixedOnline & MultiplayerFixed an issue where players could fail to sign in due to legacy avatar data.
changedOnline & MultiplayerImproved shutdown handling of audio graphs when network users disconnect.

Patch Notes – Version 1.5.0.1

Online & Multiplayer

  • Added a new warning message when the game client is outdated and cannot play online.

  • Fixed a missing callback that caused version-mismatch connection failures.

  • Fixed an issue where selecting a lobby on a different backend prevented selecting other lobbies - lobby details are now fetched only when attempting to join.

  • Fixed a Lua error caused by incorrect parameter order during failed Social Event matchmaking.

  • Fixed an issue where players could fail to sign in due to legacy avatar data.

  • Improved shutdown handling of audio graphs when network users disconnect.

  • Improved server performance.

  • Fixed a crash caused by processing the lobby list twice.

  • Fixed missing text in the player reporting dialog.

  • Fixed a crash when finishing a Social Race.

Stability & Systems

  • Added protection in audio code to prevent rare invalid value (“NaN”) errors.

  • Addressed fast-math divergence between platforms to improve simulation consistency.

  • Fixed incorrect vehicles showing up in License Test after starting an Endurance race.

  • Added additional null-pointer protection and increased memory headroom for True-Track presets to resolve rare crashes.

  • Fixed a memory leak in True2Track preset handling.

  • Improved code logic to prevent unexplained crashes during audio and gameplay operations.

Gameplay

  • 1st infringement penalty warning added based on feedback.

  • Disabled frame-rate limiter during replays.

  • Tyre Warmer setting now defaults ON in new profiles.

  • Fixed an issue where certain vehicle setup values were not applied to physics when loading setups.

  • Removed debug Page Up/Page Down camera-cycle keys.

  • Reduced skid-audio sensitivity on dry tyres for clearer feedback during understeer.

  • CosmeticImproved pit-exit behaviouroverlapping exit lines no longer allow unsafe merges.

First-Time User Experience (FTUE)

  • Fixed soft-lock and backspace issues during calibration.

  • Updated FTUE assist presets to better values.

Driver AI

  • Improved AI lateral awareness to combat AI driver blind spots.

  • Improved AI driver engine stall restart logic.

  • Enhanced AI logic to help combat AI to player collisions.

Vehicles

General Fixes

  • CosmeticMazda RX-7Added front chassis blocker.
  • CosmeticPanoz Esperante GTR1Updated diveplanes and corrected attachment across all LODs.
  • CosmeticPorsche 911 GT3 (2004)Improved cockpit mirror vibration.
  • CosmeticCamaro ZL-1 GT4Adjusted brake-light physical position.
  • CosmeticCorvette C5R, Mercedes CLK-LM, Toyota Supra GT4Added missing window-banner shadow meshes.

LMDh

  • Enhanced traction-control behaviour at low speeds.

  • Iterated on cold-tyre falloff and steering-rack speed.

  • Aston Martin Valkyrieapplied new performance data as part of pad-driving fixes.
  • Additional manual adjustments applied to support improved drivability based on player feedback.

GT Classes

GT3

  • Altered grip falloff at slip for more consistent handling.

  • Standardised steering, tie-rod, and damping stiffness for a tighter, more unified feel.

  • Updated tyre adhesive falloff across all compounds.

  • Added slight cold-temperature falloff to balance increased grip.

  • Improved default setups to all GT3 cars based on player feedback.

  • Handling revision:

    • Adjusted decel torque and engine inertia.

    • Updated throttle-blip behaviour.

    • Cars now roll more naturally into corners, (note: may require brake-bias adjustments).

GT4

  • Adjusted adhesive grip falloff across all compounds to align with GT3 improvements.

  • Improved default setups to all GT4 cars based on player feedback.

Cup & Other Classes

  • CosmeticPorsche 992 CupImproved default setups based on player feedback.

Tracks

Nurburgring Nordschleife

  • Reduced brightness and opacity of ground and wall graffiti.

Other Tracks

  • CosmeticZolderReopened garages that were unintentionally closed.
  • CosmeticNürburg GPRestored missing dressing for Sprint layout; added dressing across all variants.

Audio

  • Added cockpit RTPC parameter to improve exhaust attenuation in the Valkyrie.

  • Updated Valkyrie audioadded subwave, rebalanced exhaust, boosted

Source

Steam News / 28 November 2025

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