2D Navigation
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Add to NavMeshSurface the ability to generate a NavMesh for 2D games based on sprites or on Unity’s 2D Physics colliders. The existing components of NavMeshAgent, NavMeshObstacle, OffMeshLink and NavMeshLink could then be used in the 2D game.
2D/3D Grid Navigation
Provide the structures and the systems necessary for running navigation and pathfinding in game levels designed with regular grids of tiles.