Function RecastBuilder.BuildTileMeshes
Builds meshes for the given tiles in a graph.
TileBuilder BuildTileMeshes (
graph  |         ||
tileLayout  |         ||
tileRect  |         
Builds meshes for the given tiles in a graph.
Call Schedule on the returned object to actually start the job.
You may want to adjust the settings on the returned object before calling Schedule.
// Scans the first 6x6 chunk of tiles of the recast graph (the IntRect uses inclusive coordinates)
var graph = AstarPath.active.data.recastGraph;
var buildSettings = RecastBuilder.BuildTileMeshes(graph, new TileLayout(graph), new IntRect(0, 0, 5, 5));
var disposeArena = new Pathfinding.Jobs.DisposeArena();
var promise = buildSettings.Schedule(disposeArena);
AstarPath.active.AddWorkItem(() => {
    // Block until the asynchronous job completes
    var result = promise.Complete();
    TileMeshes tiles = result.tileMeshes.ToManaged();
    // Take the scanned tiles and place them in the graph,
    // but not at their original location, but 2 tiles away, rotated 90 degrees.
    tiles.tileRect = tiles.tileRect.Offset(new Vector2Int(2, 0));
    tiles.Rotate(1);
    graph.ReplaceTiles(tiles);
    // Dispose unmanaged data
    disposeArena.DisposeAll();
    result.Dispose();
});