When you work with terrain, maybe you need to design some areas to be walkable, while others are not.
At this time, you need to define and generate corresponding models to bake navmesh.
To avoid the need to manually build these models, or export the terrain to external software for editing.
NavMesh Generator can help you to quickly define the walkable area in unity and bake out the corresponding navmesh.
Note:
The sample house model does not exist in Asset.(Just for demonstration)
