Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the track_creator zip.

Usage

1. Open the Track tab in the 3D viewport sidebar (N). With no track selected, pick a kind of circuit (step 1), then click a layout picture (step 2) or press Random Circuit. The track is added at the 3D cursor.
2. To use your own shape, select a curve and press Track From Curve.
3. The card at the top shows the layout, its length, turns and longest straight. Edit Shape opens the curve in edit mode: move, add or delete points and the track rebuilds live. Variation gives new scattered details (and a new shape for random circuits).
4. The icon tabs hold every setting: Layout, Surface (width, asphalt, rubber, lines, grid), Curbs, Runoff, Barriers, Trackside (pits, grandstands, lights, trees), Ground and Export.
5. Export writes a glTF file for game engines. Make Real turns the track into plain meshes; Delete removes it with all its parts.

Turn Live Update off on very long circuits while you edit, and press Rebuild when you are done.