To use navigation meshes effectively, also referred to as NavMeshes, the first things we need to know are what exactly navigation meshes are and how they are created. A navigation mesh is a definition of the area an AI character can travel to in a level. It is a mesh, but it is not intended to be rendered or seen by the player; instead, it is used by the AI system. A NavMesh usually does not cover all the area in a level (if it did, we wouldn't need one) as it's just the area a character can walk. The mesh is also almost always a simplified version of the geometry. For instance, you could have a cave floor in a game with thousands of polygons along the bottom that show different details in the rock; however, for the navigation mesh, the areas would just be a handful of very large polygons that give a simplified view of the level. The purpose of a navigation mesh is to provide this simplified representation to the rest of the AI system as a way to find a path between...