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Purpose-built off-roader 4x4 articulation, powered by raycast-based solid-axle physics with independent wheel travel, differential locking, and a fully tunable drivetrain. PurposUnity 2022.3 LTS or newercom.unity.inputsystem package (optional, but recommended)Delegate input system providedDemo is in Built-in render pipeline, but scripts are pipeline agnosticStop fighting Wheel Colliders. Get real solid-axle articulation.Simple Offroad Controller replaces Unity's WheelCollider with a raycast-based solid-axle system that gives you independent left/right wheel travel per axle, true differential locking, and a full tunable drivetrain, from the engine torque curve and gear ratios to spring rates, damper curves, and differential bias ratios.Use the Auto-Configure wizard to go from meshes to a driving vehicle in under a minute, or build your hierarchy manually for full control.Solid-Axle PhysicsReal articulation with independent left/right suspension travel per axle4-ray wheel cast: center, left edge, right edge + forward-down step detection at 30°No WheelCollider, every ground interaction is custom raycastSpring-damper suspension with adjustable ride height, bump travel, droop, spring rate, and dampingAnti-roll bar per axle with tunable stiffnessDrivetrainEngine simulation: multi-keyframe torque curve, rotational inertia, kinematic RPM coupling (engine speed driven by wheel speed through gear ratios), stall detectionAutomatic transmission: configurable gear ratios (4/5/6-speed presets), shift-up/down RPM thresholds, shift durationDifferential models: Open, Locked, and Limited-Slip with configurable torque bias ratioLow range (4LO): torque-multiplying transfer case gearToggleable 4WD: switch between 2WD and 4WD per axle on the flyTire ModelThree-region lateral force curve (linear climb → gradual falloff → residual grip)Peak slip angle, max slip angle, and slide grip ratio, fully tunable per axleFriction circle coupling — throttle and brake forces interact with lateral gripRelaxation length, lateral force builds based on tire rolling distance, not a fixed timer, for realistic weight feelSpeed-scaled force response (progressive turn-in at low speed, responsive at high speed)SteeringMax steer angle, sensitivity, smooth speed, and auto-return per axleHigh-speed reduction, reduces effective steering angle at speed for a forgiving arcade feelReference speed control for reduction curveInvert steer per axlePresets (One-Click Setup)Vehicle presets: Rock Crawler, Trail Rig, Overlander, Baja Racer — set weight, engine, transmission, suspension, differentials, and aerodynamics in one clickEngine presets: V8 (diesel torque), V6 (balanced), I4 (high-RPM), I6 (broad flat curve)Transmission presets: 4, 5, or 6-speed gearboxesInputNew Input System (PlayerInput / .inputactions asset) via OffroadInputSystem — auto-added, no manual wiringOffroadInputDelegate for code-driven control: AI, testing, networked vehiclesMax throttle slider for keyboard demosAuto reverse hold brake at standstillAI Driver (BETA)Pure pursuit steering on a smooth Catmull-Rom spline pathCurvature-based speed planning with approach braking and recovery zonesSpeed-adaptive lookahead distanceObstacle avoidance (optional, 5-ray fan)4WD, low range, and e-brake supportAuto-rebuilds path when waypoints move in the editorCameraForza-style follow camera with velocity look-aheadMouse freelook with auto-recenter when drivingSpeed-based pushback and ground-height avoidanceMulti-camera manager for switching (interior, chase, bumper, etc.)Effects & FeedbackTire noise, velocity-based lateral slip with configurable volume/pitch curves and cooldownDust particles on slipOffroadAudio, dual AudioSource with RPM-blended pitch/volume crossfade (idle + running), shift sounds, stall mutingOffroadLightManager, 4-state cycle (Off → Main → HighBeam → Accessories) with automatic brake and reverse lightsOffroadInfo (telemetry), real-time HUD overlay showing RPM, gear, speed, torque, compression, articulation, differential mode, and moreRich gizmo visualization, axle center, suspension travel, bump/droop stops, steer cone, spring zigzagVehicle FeaturesTraction control (strength 0–1)Brake torque and e-brake per axleParking hold with configurable speed threshold and hold forceAerodynamics, drag and downforce with speed-squared scalingManual transmission mode supportWhat's Included17 C# scripts (runtime + editor)Custom inspectors with preset buttons, sliders, and real-time gaugesAuto-Configure editor wizard (body + wheel setup)Full documentation with setup guide, component reference, and tuning tipsDemo scene with a fully configured vehicleDocumentationTo maximize development efficiency and deliver faster updates, this asset utilizes an agent-assisted software engineering workflow. As a solo developer with over a decade of dedicated Unity experience, I maintain strict oversight.Every system and architecture choice developed via agentic tooling is thoroughly vetted and production-tested by me to ensure it meets standards I have maintained for over a decade.Embracing modern agentic workflows allows me to scale production speeds while maintaining the exact craftsmanship, stability, and deep optimization my users have come to expect across my portfolio.