Tidebone Road – Procedural Road Generator (Geometry Nodes)

Version 1.0

One Geometry Nodes generator for roads and streets, built entirely procedurally. Put the modifier on a curve and get an asphalt road with lanes, road markings, curbs, sidewalks, street lamps and manhole covers – or let it follow your terrain.

No add-ons, no Python, no image textures.

Requirements

• Blender 4.2 LTS or newer. Tested headless with 4.2.23 LTS, 4.5.14 LTS and 5.2.1 LTS: 45 parameter cases each, 0 errors, 0 node warnings, identical vertex and face counts in all three versions.
• Units: metres. Rendered and checked in Cycles (CPU); EEVEE and the Blender GUI were not tested.

Files

Installation

Asset Browser (recommended): Edit > Preferences > File Paths > Asset Libraries → + → the folder with the .blend. Drag the group onto a curve.

Append: File > Append → tidebone_road_kit.blend → NodeTree → Tidebone Road, add a Geometry Nodes modifier to a curve and select it.

Quick start

• Add a curve (poly spline is best: Add > Curve > Path, or convert mesh edges with Mesh to Curve), add the modifier, choose Tidebone Road. Move the curve points to route the road; Corner Radius rounds the corners.
• Lanes and Lane Width set the width (the output Road Width tells you). Even lane counts get a centre line (style in Center Line), odd counts get dashed lane lines.
• Sidewalk, Lamp Side, Curbs, Manhole Spacing: switch what you need.
• Follow Ground: tick it and pick your terrain mesh in Ground. Lower Resolution (e.g. 0.5 m) for hilly ground.
• Look: Asphalt Wear and Paint Wear from 0 (new) to 1 (broken).

Inputs (summary)

Geometry (curve) · Lanes · Lane Width · Corner Radius · Resolution · Markings (Center Line, Edge Lines, Dash Length, Dash Gap, Line Width, Center Line Color, Edge Line Color) · Curbs & Sidewalk (Curbs, Curb Width, Curb Height, Sidewalk, Sidewalk Width) · Street Lamps (Lamp Side, Lamp Spacing, Lamp Height) · Details (Manhole Spacing) · Ground (Follow Ground, Ground, Ground Offset) · Look (Asphalt Wear, Paint Wear) · Materials.

Outputs (for your own node setups)

Length, Road Width, Lamp Count.

Attributes (for your own shaders)

tr_color (point colour), tr_wear (0–1) are written on all parts.

Polycount guide (measured, Blender 4.2, 94 m road with default settings unless noted)

Not a game-ready asset: apply and decimate or bake for real-time. Resolution is the main lever (1 m by default).

Tips

• Keep Corner Radius above half the road width plus curb and sidewalk (e.g. 6 m for a 2-lane road with sidewalks), otherwise the inner edge folds over.
• Buildings, trees and cars are not included (the preview scenes use simple box buildings).
• Several roads, one look: same colours and wear, different curves.
• Lamp arms point towards the road; Left / Right are seen along the curve direction.
• Follow Ground does not bank the road: it rides on the highest terrain point across its width and shows a deep slab side where the terrain falls away.

Known limitations (v1.0)

• One curve = one road. No junctions, roundabouts, bridges, tunnels or intersections; no lane-count changes along the curve.
• Corner rounding works on poly curves. Bezier and NURBS curves are followed as they are (NURBS evaluate with the curve's own resolution and may differ between Blender versions).
• No crosswalks, arrows, bus stops or road signs; markings are lines only.
• Follow Ground ray-casts from above (no overhangs, no bridges); the road is not banked across its width.
• Textures are procedural and live in object coordinates: the look can change if you scale the object non-uniformly.
• Cycles only; EEVEE and GUI not tested. No Quest/real-time optimisation.

Changelog

• 1.0 – Road generator (lanes, markings, curbs, sidewalks, lamps, manholes, Follow Ground), 4 materials, asset catalog, demo scene.

License

See LICENSE.txt. In short: use it in any personal or commercial project, royalty-free; do not resell or redistribute the asset itself. Personal license = one person; Studio license = one company, up to 10 people.

© 2026 Tidebone