Just a feedback for anyone (hopefully not) stumbling on this… problem.
PROBLEM:
Enabling World Partition may cause all AI movement to stop working on some levels without saying why.
- BT node MoveTo doesnt work
- AI Move To node doesnt work
- GetRandomLocationInNavigableAreaAround location is always the location
- Calculate path always returns fails
WHY:
This is because the moment WorldParition is enabled, unreal seems to expect all levels to be paritioned. And if they arent: navigation no longer works and nothing is logged to warn it.
HOW TO FIX:
In the level there’s an object auto generated by your NavMeshBoundsVolume called ‘RecastNavMesh-Default’, on it the parameter IsWorldParitioned has to be manually set to true or false depending if the level has been paritioned.
-Note: if this object is deleted: you’ll have to reconfigure it. Never forget.
Theres a global project parameter for this in the project settings, search for IsWorldPartitioned. This does it for all levels.
Ideally Epic could by itself know if the level is partitioned and avoid us the hassle of having to manually set this bool (or suffer 5h not knowing wtf is happening and rerolling many commits back).
