Woah this map does feel like I have no idea what floor I'm on. Too bad you could not get portals working. Still awesome though.

@TheOgre26 Thanks but I’m not even ready to understand your tutorial lol. You’re welcome to edit the map yourself, remember this is just a reupload.

I've been using hammer since January 2016, and I have basic experience in AI noding. In the "tools" sidebar, click the entity tool, search through the entity browser for "info_node", then copy and place them anywhere where an npc is capable of walking. This acts as a network of linked paths (regardless of the Node ID) that npcs use to navigate the map. The last steps are to go to "map" > "Entity Report" > check the box saying "By class" and type "info_node" in the search menu. Select ALL the entities and move them any distance above the ground for them to work.
I hope I have helped enough, though AI noding can get very complicated sometimes.

@TheOgre26 I’m sorry I don’t know enough about using Hammer to do that stuff yet.

Fantastic brush quality! I do recommend importing AI noding as separate content or built in the map, as well as a 3d skybox (maybe a future-city in the background?).