Changelog

All notable changes to Chassis are documented in this file. The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.12.1] - 2026-11-10

Fixed

• An officer who wants to search you in a car no longer starts a chase at once. He pulls you over, walks to your window and searches you in your seat. Driving off still counts as failure to comply.

[1.12.0] - 2026-11-10

Added

• Getting into a car starts in the view you had when you last got out. StartInFirstPerson starts every seat in first person.

Fixed

• After honking at a police checkpoint, the view no longer jumps to where you got into the car once the officer has talked.
• The checkpoint officer no longer walks back and forth when the spot beside the driver door is blocked.

[1.11.0] - 2026-11-09

Added

• Use hotbar items in any vehicle seat: eat, drink, smoke and hold weapons. Weapons fire in first person, and trash goes out of the window.
• Optional ignition: turn the key beside the wheel (I) to switch the engine off and on, or press the auto ignition button to drive as before.
• The tag on the ignition key has the colour of the car and changes with it when the car is repainted.
• Honk at a police checkpoint to call the officer to your window. He searches the car while you stay inside.
• Indicator, first person and ignition keys can be changed, and each can get a controller button ([Chassis] in MelonPreferences.cfg).

Fixed

• Underglow lights the ground as one even strip instead of separate spots.
• The driver no longer shows standing for a moment when getting into a car.

[1.10.4] - 2026-11-07

Fixed

• Suspension upgrades lower the car again. Every stage raised the body instead, on every car, most visible on the Cheetah.

[1.10.3] - 2026-11-05

Fixed

• Cabin light and rear-view mirror no longer poke through the windscreen. Most visible on the Cheetah, the mirror corner also showed on every car except the Hotbox.

[1.10.2] - 2026-11-05

Fixed

• Side mirror glass follows the rounded shape of the mirror on the Cheetah, Hounddog, Veeper and Hotbox, instead of a rectangle with its corners sticking out.

[1.10.1] - 2026-11-05

Fixed

• Side mirrors of the Cheetah and the Hounddog show the whole mirror instead of a grey face with a thin strip. Reported by MR.Monkey.
• The Veeper's side mirror glass fills its whole mirror.

[1.10.0] - 2026-11-05

Added

• Cabin light in the vanilla cars: it fades on when someone gets in or out and while the car stands, and off when you drive.
  • Click the dome lamp to switch between Auto, On and Off.
• Glovebox right of the centre console, reachable from both front seats, also while driving. 2 to 4 slots by car size, saved with the car.
  • GloveboxOwnStorage = false makes the lid open the trunk instead, so saves stay vanilla.

[1.9.2] - 2026-11-03

Fixed

• With MirrorShowsOwnCar on, the side mirrors no longer show the edge of their own housing in the middle of the picture.

[1.9.1] - 2026-11-03

Fixed

• The left and right arrow keys switch the indicators in vanilla cars again, and the key hints bottom left list them.

[1.9.0] - 2026-11-03

Added

• Every vanilla car has a live rear-view mirror and two side mirrors.
• A Mirrors row in the graphics settings, below Reflections: Off, Rear Only, Rear + Side (default) or + Nearby Cars.
  • • Nearby Cars also shows the mirrors of up to three cars within 15 m, on foot too. Setting: Mirrors.

Changed

• Reflections also sets how sharp the mirrors are.

Fixed

• Chrome paint now reflects the sky and looks brighter.

[1.8.3] - 2026-11-02

Fixed

• Cars keep their windows and interior at a distance, and a hidden car no longer leaves its interior floating.
• NPCs put their umbrella away while driving.

Changed

• Thunderstore and Nexus Mods may now review the mod files: the license names their package review as an exception.

[1.8.2] - 2026-11-01

Fixed

• Less stutter with several chrome cars on Reflections Ultra: they share one refresh rate, and near cars refresh more often than far ones.
• The speed display no longer stays on screen for co-op clients after they leave a vehicle.
• Loading a save several times without restarting the game piles up far less memory for car interiors.

[1.8.1] - 2026-10-28

Fixed

• The horn no longer carries across the map: it fades with distance, sounds duller far away and is silent past 80 m.

[1.8.0] - 2026-10-27

Added

• New "Reflections" row in the graphics settings, Low to Ultra. High and Ultra give sharper chrome that updates faster.

Fixed

• Tuned cars no longer reverse almost as fast as they drive forward.
• Lowered suspension now shows on big vehicles like the RV.
• Underglow no longer lights the inside of the car.

For mod authors

• ChassisApi.HornClip returns the sound a vehicle's horn plays.

[1.7.1] - 2026-10-27

Fixed

• Window tints are clearly darker; the game's fog washed them out to grey.
• Changing the window tint no longer flashes the stock body colour for a moment.
• Chrome paint looks like chrome and reflects the street around the car, also while it drives; metallic paints look metallic.
• Neon lights the ground in an even band along the sills and bumpers, with no tube in sight.

[1.7.0] - 2026-10-26

Fixed

• Key hints on Left Ctrl show up at the bottom left: the game has no picture for that key and dropped them.

For mod authors

• ChassisApi.PreviewTuning, PreviewPart and EndPreview show a part or a paint on this machine only, without saving or syncing it.
• ChassisApi.SetPaintTargets puts the body paint on your own model instead of the stock body; Secondary targets take the second paint.
• ChassisApi.PaintRenderers paints a model with no car under it, on this machine only.
• ChassisApi.AddKeyHint takes any key: one the hint strip has no picture for is drawn on a wide key with its name.

[1.6.1] - 2026-10-22

Fixed

• The cheetah's body beside the rear window is no longer see-through.

[1.6.0] - 2026-10-22

Fixed

• Cars bought while Steam was not ready at the start are yours again in a lobby: locked cars let you in and the Yesla app shows.

For mod authors

• SeatProfile.Recline leans the seated body back about the hips with a straight back; hands, feet and eyes keep their points. Console: chassis profile set recline <degrees>.

[1.5.0] - 2026-10-22

Added

• Drivers hold the steering wheel: both hands close around the rim and turn with it, for you and for NPC drivers.

For mod authors

• HandProfile.RimRadius, RimThickness, RimOffset and GripAngle close the hands around the rim. FitSeat measures RimRadius from the wheel's mesh.

[1.4.0] - 2026-10-21

Added

• Hold G to keep the horn sounding; it stops when you let go.
• Steering is calmer at speed: the wheels turn less the faster you go and ease back to straight. SpeedSteering turns it off.

[1.3.0] - 2026-10-21

Changed

• The drivable wheelchair moved into its own mod, Rollin. Install Rollin to keep riding and pushing wheelchairs.
• A repaint at Marco's replaces paint that a tuning mod gave the car.

For mod authors

• Tuning API: RegisterTuningPart, InstallPart and RemovePart for parts with their own model and driving factors.
• Built-in parts: engine, brakes and transmission stages 1-3, suspension 1-4, turbo, drift tyres.
• SetPaint (primary, secondary, finish), SetRimColor, SetXenon, SetNeon, SetWindowTint, SetTyreSmoke and SetHorn. SetTuning and GetTuning store keys of your own mod.
• The host checks each change against the owner, syncs it and saves it with the car. TuningStatsOf and TuningChanged read it.
• PoseAsPusher, ReleasePusher and PushedBy let a player push a vehicle from behind, as Rollin's wheelchair does.

[1.2.0] - 2026-10-21

Added

• The speedometer and rev counter in the vanilla cars move, dash lamps show indicators and headlights. SpeedUnit sets kmh or mph.
• In first person, look at a dash switch and left-click it: lights, hazard lights, indicator stalk (also mouse wheel), horn. Switches click, indicators tick.
• A dot in the screen centre shows where you look while your view is below the windscreen, with the switch's name.
• The vanilla cars flash their own amber indicator lamps outside, at the rear part of the brake light in red where a car has none.
• Guns hit NPCs in cars. A driver who goes down falls out and the car stops.

Fixed

• Vehicle owners and locks are no longer lost when the game saves.
• Seats and the driver's legs no longer stick out under the cars.
• The steering wheel no longer spins faster than the hands could turn it.
• Getting in crouched no longer leaves you crouched in the seat.

For mod authors

• ChassisApi.SetInterior builds your own interior; ChassisProfile.Gauges and ChassisProfile.Controls bind needles, lamps, digits and clickable switches.
• ChassisApi.Telemetry, ReadGauge and RegisterGaugeSource: speed, rpm, pedals, lamps, steering, clock, odometer, trip, each with a validity flag.
• RegisterControlAction, UseControl, ControlUsed and the events HeadlightsChanged, BrakeChanged, ReverseChanged, DriverChanged.
• RegisterOccupantDown keeps a shot NPC slumped in its seat instead of falling out; RemoveOccupantDown removes it.
• chassis telemetry and chassis zones work in the release build. The GitHub release also carries Chassis_1.2.0_debug.zip with the developer console commands.

[1.1.0] - 2026-10-20

Added

• The key hints at the bottom left show the vehicle's keys: V First Person, G Horn, and the arrow keys for Indicators on vehicles with indicator lamps.
• Behind a wheelchair the key hints show Push and Let Go, with your own key bindings.

Fixed

• NPCs in low cars like Sam's and Michael's Coupe drive off again instead of sitting still at the curb.

For mod authors

• ChassisApi.AddKeyHint puts your own key into the key hints, a fixed key or one from your preferences. RemoveKeyHint takes it out.
• The show callback gets a KeyHintContext with Vehicle, Profile, Seat, Driver and Pushing.

[1.0.1] - 2026-10-20

Changed

• Chassis has its own icon in Thunderstore and r2modman.

For mod authors

• Every type and member is listed in the API reference, linked from the README.

[1.0.0] - 2026-10-20

Added

• You sit visibly in the driver's seat with both hands on the wheel, and the wheel turns as you steer. Co-op players see it too.
• Press V in a vehicle to switch to first person.
• G sounds the horn. The left and right arrow keys set the indicators on vehicles that have indicator lamps.
• Vanilla cars get seats, a dashboard, a steering wheel and tinted glass. NPC drivers sit visibly, police included. BaseInterior turns both off.

For mod authors

• ChassisApi.Register adds a vehicle profile from code; FitSeat builds a seat profile from the vanilla seat.
• Honk, SetIndicator, SetLocked, SetOwner, SetPart and SetStorageEnd act on a LandVehicle and sync in co-op.
• FirstPersonActive, FirstPersonChanged, IndicatorChanged and OwnersChanged report state to your mod.