Terra Rally - Procedural Rally Track Generator for Unity URP

Terra Rally is a powerful and intuitive procedural track and rally environment generator for Unity URP, designed to create realistic rally stages, mountain passes, and racing circuits in minutes.

Whether you are building an arcade racer, an off-road rally simulator, or an open-world driving experience, Terra Rally automates the tedious parts of level design by seamlessly extruding drivable tracks, carving and adapting the Unity Terrain, building engineered civil structures, and scattering natural ecosystems with a single click.

Ready-to-Use Demo Scene:

Get driving immediately! Terra Rally includes a complete, pre-configured sample scene located at Assets/CarmesimGameStudio/Terra Rally/Scenes/Demo Scene.unity. Fully lit with URP Post-Processing, sculpted terrain, high-res asphalt track, guardrails, retaining walls, and a dedicated Car Spawn Point—ready for vehicle testing out of the box!

Welcome Setup Wizard & Ecosystem Integration:

Terra Rally includes an automated Welcome Wizard (Tools > CarmesimGameStudio > Welcome (Setup)) that pairs seamlessly with the official free Unity URP Terrain (Terrain Sample Project). With 1-click Auto-Configuration, it scans and maps photorealistic trees, bushes, rocks, and PBR terrain layers directly into your presets.

Key Features:

- Procedural Road & Shoulder Extrusion: Instantly generate smooth asphalt, gravel, and dirt circuits with physics MeshColliders and UV mapping. Supports custom scene splines or procedural layouts.

- Automated Hydraulic Terrain Sculpting: Real-time roadbed shelf flattening, smooth hillside embankments, and 6 procedural relief styles (Alpine Peaks, Rolling Hills, Canyon Mesas, Volcanic Caldera, Fjord Valley, and Custom Stamp Brushes).

- Multi-Layered PBR Splatmaps: Automatic slope and elevation painting for dirt (roadbed/riverbeds), grass (meadows), and rock (steep cliffs) terrain layers.

- Civil Infrastructure & Bridges: Procedural concrete retaining walls with tieback anchor plates and wing walls, continuous W-beam guardrails, and 3 architectural bridge styles (Concrete Box Girder, Steel Warren Truss, Timber Trestle) with carved river gorges and water ribbons.

- 4-Layer Forest & Nature System: Scatter canopy trees, bushes, rocks, and surface grass tufts. Features smart rock-size filtering (large boulders frame scenic vistas while small rocks keep clear of racing lines) and keep-out safety corridors.

- Rally Props & Apex Waymarking: Start/Finish gantry with car spawn point transform, directional chevron warning signs, and apex cones strategically placed along corner clipping points.

- 12 Ready-to-Use Biome Presets: Alpine Pass, Forest Hills, Mountain Touge, Coastal Cliffs, Winter Pines, Desert Canyon, Gravel Hills, Lunar Canyon, Mediterranean Dust, Military Tarmac, Rocky Ruins, and Savanna Rift.

- Non-Destructive Workflow: Staged execution with 5 sub-buttons (Track & Spline, Road Mesh, Conform Terrain, Scatter Nature, Place Props) and full single-stroke Undo (Ctrl+Z) support.

- 4 Custom PBR Shaders (URP): Realistic Road Asphalt (with skid marks), Retaining Wall, Dirt Road, and Racing Kerbs.

Technical Details:

- Version: 1.0.0

- Render Pipeline: Universal Render Pipeline (URP 14+ / Unity 6)

- Supported Versions: Unity 2022.3 LTS, Unity 6.0+ (6000.x)

- Architecture: C# source code organized with Assembly Definitions (.asmdef)

- Mesh Optimization: Automatic 32-bit index buffers for high-density tracks (>65k vertices) and pre-flagged static geometry.

- Documentation: Complete 16-page User Manual included in PDF format.

- Zero loose UI files: Clean editor binaries with embedded interface resources.

Support:

Website: https://www.carmesimgamestudio.com

E-mail: contact@carmesimgamestudio.com