Terrain Pathing

How do I make it so I can set an entire rect to be unaccessable by flying unit? I tried using "Environment - Turn Terrain Pathing On/Off" but that just turns off 1 cell at a point and not the entire rect..

Theres a doodad called Pathing Blocker - Air.
This blocks all air units from passing through that area.

Yes but the area is very large, and that would take like 80 of those.

if it took 80 large air pathing blockers, it would take about 320 function calls of the Pathing function to cover the same area. I would go for pathing blockers.

It probably took you more time to post this question than it would to place pathing blockers.. :D

Really? I don't care.

My point is, is there a way to do this? Maybe a custom script function?

If you're so averse to pathing blockers you could try using that function for every cell around the edge of the rect.

Also, please keep posts civil and on topic :)