Spawn area of map not being picked up by nav mesh

So far, I have created a custom version of badlands, this VMF was from the source sdk, so no rants about decompiling please . In it, I am attempting to generate a nav mesh for the map. Whilest almost all areas of the map are being picked up by the nav generation, the blue team's spawn area is not.


To put down some background, the lower spawn exits have been removed in this map, leaving the blue team only able to exit from the top areas.


Has the removal of these lower exits caused the map to be unable to detect the top area as walkable space? Is there anything I can do in Hammer to allow it to be detected as walkable space, via bot-hint entites or something?

File for this map has been attatched.
If you have questions or additional clarification, please let me know!

Pinsplash said:

That's exactly it: the map started generating at the middle and it can't find a way up into blu's base. Point your crosshair somewhere in blu's base, use the command nav_mark_walkable, then nav_generate again.

Click to expand...

Yea, although I was expecting the solution to be through hammer and not nav generation (hence why I asked on tf2maps), this was infact the answer. Thanks man.

Is it not possible to define such areas and edits through Hammer at all? Tired of every time I make the tiniest little change to my map the nav mesh comes out of date, not a big deal usually, but with edits, you must re-make the edits every time.

Nah, the entire idea of the map revolves around bot's usage. So I need to change part of the nav here, change part of the map there......

I need to generate a new nav mesh to get a nav mesh for the updated version of the map, as the update makes the old ones outdated. However, any edits I've made will then be undone, causing me to need to re-make them. What is the "functionality related to this" that you mean?