Gravel roads and dirt tracks
Country lanes and farm tracks with their own textures.
In Roads, use Create gravel road or Create dirt track. Wayline makes its own original textures in your OMSI installation, so the roads don't depend on anyone else's artwork. The new type is selected under My roads.
Join them to normal roads the usual way. Junctions and two-arm transitions can blend the two surfaces, so a lane doesn't change from tarmac to gravel in a hard line.
Note
Existing imported junction scenery isn't converted automatically. Blending reduces hard material changes, but it doesn't guarantee perfect marking alignment on every custom road type.