Where is Roadscape ?
Roadscape is a geometry node based addon, which means, its main features takes place in the modifier tab of each object, as a geometry node modifier.
Contrary to python addons, which usually have their own menus located in the N panel of the 3D Viewport.
Roadscape generators are shipped as object assets and not as geometry node assets.
So this is not a geometry node tree that you will add to any object and create roads from it.
It is a premade object that you drop into your scene.
The reason for this, is that Roadscape works with edges and not curves, edges so that we can store attributes as vertex group in order to differentiate each bit of road.
We won’t get any further into the details since it doesn’t have any value to the user.
It’s also worth noting that the product also comes with two additional python addons, Procedural UV to Real UV and Roadscape Performance Mode.
Naming Convention
In order to use Roadscape, and particularly to understand the documentation, it is important to understand what I mean by certain terms, so here is an overview:
Main Generator: The main generator is the road generator, it is the one onto which all the other generators (extra generators) are based.
Extra Generator: Any generator that isn’t the main generator. All the extra generators needs the existence of the main generator in the scene in order to work properly.
Path Mesh: The path mesh is the base geometry of the main generator. Which means, it is the geometry that actually exists when entering the Edit Mode of the main generator. The very geometry that exists without the intervention of the generator itself. This geometry is mainly composed of bare segments of edge. It also can be composed of faces (for the Fill feature for example).
The path mesh is the geometry onto which we assign vertex groups in order to differentiate roads from bridges for example.
Road Mesh: The road mesh is the generated road mesh from the main generator.
Support Mesh: The support mesh is the generated bit of mesh that is often times a bit larger than the road mesh but follows the same exact path, this mesh is merged with the original terrain mesh within the main generator process.
Original Terrain: The original terrain is the base terrain object you want to terraform with Roadscape. It is the terrain mesh that you want to use and assign within the main generator. The main generator needs the original terrain to be assigned to it in order to work properly.
Terrain: The terrain is the generated mix of the support mesh and the original terrain, namely the terra-formation resulting from the main generator.