Connect NavMeshes on Additively Loaded Scenes | AI Series Part 16

In this tutorial I show how to connect prebaked NavMeshes on different scenes together. This is a really common problem when you load a scene using SceneLoadMode.Additive. We'll connect the additively loaded scenes' already baked NavMeshes by setting up a set of NavMeshLinks in the second scenes that hook back to the previous scene. When a player comes nearby, the second scene's NavMeshLinks will allow the player to hop over to the scene that was loaded additively without any issues.

I also put some enhancements to how the PlayerMovement works. You may have noticed when clicking to move, sometimes it got kind of hard to move around. This was because there were a bunch of colliders from the enemies we added starting in AI Series Part 7 (https://youtube.com/watch?v=QzitQSLhfG0) and we kept adding more! These colliders get in the way of the click to move. We'll update our Physics.Raycast call to filter based on a LayerMask so it only will only find targets on a particular set of layers, in this case, the Floor layer, so we don't hit any enemy colliders anymore when we click!

This was a question asked in the comment section by "you slug"! This was a really great topic to cover that affects a large variety of games! Thank you for the idea!

As usual with the AI Series, we're using the NavMesh Components: https://docs.unity3d.com/Manual/NavMesh-BuildingComponents.html not the built-in navigation system.

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