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Navigation Areas and Costs
Using NavMesh Agent with Other Components
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Loading Multiple NavMeshes using Additive Loading

The NavMeshes in different ScenesA Scene contains the environments and menus of your game. Think of each unique Scene file as a unique level. In each Scene, you place your environments, obstacles, and decorations, essentially designing and building your game in pieces. More info
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are not connect by default. When you load another level using Application.LoadLevelAdditive() you will need to connect the NavMeshes in different Scenes using an Off-Mesh link.

In this example we have Scene 1 and Scene 2. The Scene 1 has an Off-Mesh Link starting over a walkable area and landing over a walkable area in Scene 2. There can be as many Off-Mesh Links connecting the Scenes as necessary.

When authored the other end point of the scene connecting Off-Mesh links are not connected. After a new Scene is loaded, the Off-Mesh Links will be reconnected.

If the multiple scenes have NavMeshA mesh that Unity generates to approximate the walkable areas and obstacles in your environment for path finding and AI-controlled navigation. More info
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overlapping at the same area, the position picking may be arbitrary NavMesh at that location. This applies to agents, Off-Mesh Links and position picking using the NavMesh API. You should create the scene crossing Off-Mesh links so that they start and end clearly on over one NavMesh only. Overlapping NavMesh areas are not automatically connected.

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Navigation Areas and Costs
Using NavMesh Agent with Other Components
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