I've been working in the Fallout 3 and Fallout New Vegas level editor, GECK, and I was curious if other games (that have a modding community) implement AI pathing the way Fallout does. Skyrim has the same AI pathing paradigm. This is obviously but one particular way in which you paint AI paths, but I haven't worked in other level editors besides UDK, so I honestly don't know how other games implement AI pathing. But in the UDK, AI pathing is up to you, you have to create the AI system from scratch or use some plugin that some other team has written (I'm guessing this is the case also for CryEngine, Source SDK, and Unity). I'm just wondering how its done in other level editors, engines, for other games. I don't really know any of the theory behind AI pathing (its alot of damn math for sure though), but I'm guessing Fallout's/Skyrim's navmeshing isn't the only way to paint AI paths onto level geometry.