What must GameObjects be set to in order to be included in the NavMesh?

GameObjects must be set to "Navigation Static" in order to be included in the NavMesh. This setting designates the object as static in terms of navigation, meaning that it will not be moving during gameplay and can therefore be baked into the navigation data used by AI agents.

When a GameObject is marked as Navigation Static, it allows the Unity navigation system to recognize it as a navigable area for pathfinding processes. The NavMesh is a representation of all the navigable surfaces in the game, and only static objects that do not change position are suitable for inclusion in this representation. Once an object is marked as Navigation Static, it can be utilized in the baking process, allowing AI characters to intelligently navigate around and interact with these defined areas.

Other choices do not correspond to the requirements for including GameObjects in the NavMesh. For example, while "Dynamic Object" might imply that the object moves, it does not set the object as static for navigation purposes. "Static Mesh" refers to an object that doesn't change but does not specifically denote its usability within the navigation system. "NavMesh Compatible" is not an official term used in Unity's navigation system. This clarity around the specific requirements for NavMesh inclusion is essential for effective AI navigation