Road markings without a single marking texture.

Road Shader is a lit URP shader that draws side lines, centre lines, lane lines, dashes and pedestrian crossings straight from the mesh UVs. Change the layout of a road by moving a slider, not by painting a new texture. It comes with a spline race track generator that builds the road mesh, drapes it over your terrain and places barriers and trees along it.

Try it in your browser: open the web demo above, drive the sample circuit and change the markings live.

Description

MARKINGS FROM SLIDERS

• Side lines on both edges, with width, offset and colour
• Up to 8 centre lines (a double yellow is two), solid or dashed
• Up to 8 lane lines on each side of the centre, solid or dashed
• Pedestrian crossing that interrupts the lane lines with a clean gap
• Colour alpha sets paint opacity, so worn or faint paint is one slider away
• Base map and normal map tiling never moves the markings

CRISP AT ANY DISTANCE

• Every line is anti-aliased in the shader with a one-pixel soft edge
• Lines thinner than a pixel fade out instead of flickering
• Distant dashes blend smoothly instead of producing moiré

A REAL URP LIT SURFACE

• Built on URP’s own Lit passes: shadows, lightmaps, light probes, SSAO, decals, fog and screen-space effects behave exactly as on URP Lit
• Forward, Forward+ and Deferred rendering paths
• SRP Batcher compatible, GPU instancing supported
• Turning off side lines or the crossing removes their cost through shader keywords
• Markings feed baked GI, so lightmapped roads bounce the right colour

SPLINE RACE TRACK GENERATOR

• Build a track in the Inspector: add straights, left and right turns (true circular arcs), close the loop
• Or shape it freely with Unity’s Spline tools; rotating a knot banks the road
• Snap to Ground drapes the road and every prop over a Terrain or any collider
• The road is split into chunks so distant parts are culled
• Prop rules: spacing, side (left, right, both, outside or inside of turns), edge distance, jitter, and corners only. A seed keeps placement repeatable
• Save the result as mesh assets or a prefab that needs no script or spline at runtime

IN THE BOX

• The shader with a custom material inspector, and two ready materials
• Straight road prefabs, with and without a crossing
• Props: barrier, marker pole and three low-poly trees
• Tileable asphalt base map and normal map
• A demo scene with a sample circuit on a hilly terrain
• EditMode tests for the track generator

REQUIREMENTS

• Unity 6.1 or newer with the Universal Render Pipeline (tested on Unity 6000.6, URP 17.6)
• Splines package 2.9 or newer, for the track generator only

Works on any mesh with a sensible UV layout: U across the road, V along it.

If you have any questions, requests or something isn’t working, please send me an email at: support@hardartcore.com

Release notes

• v1.0.0
  • First release.