Navmesh not working when loading the levels

Development Programming & Scripting
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Navmesh not working when loading the levels

if i use one map , navmesh is working , but multiple levels the navmesh is not working

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If you do level streaming, the navmesh should be put into the persistent level. Maybe this is your problem. Same is true for Player Start and Precomputed Visibility volumes.

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Weird, in this video (timestamp included) they say it’s possible to do it in the sublevels Getting Started with Level Streaming | Live Training | Unreal Engine - YouTube… How does it work your way then? If the landscape is loaded in the sublevel, but the navmesh is already loaded, doesn’t that mean the nav mesh isn’t working for the streamed in level?

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It’s been over a year, but better late than never. I had a similar problem, but I fixed it by going to Project Settings. There’s a setting called “Should Discard Sub Level Nav Data” that defaults to true. Uncheck that, and it should work.

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I was facing the same problem, when I started the game from Map1 then the Nav Mesh inside Map1 was working but when I started it from Map2, then the Nav Mesh is Map1 did not work (you can switch between the two maps mid game).

So in project settings, setting RuntimeGeneration to True under Nav Mesh settings, did the trick for me.

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I had this exact issue. In 5.3 its project settings, search for runtime generation, set to dynamic from static.

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It worked for me, on 5.2. Thanks.

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Ran into this issue as well, none of the above solved the issue for me…however when I highlighted in my main level “RecastNavMesh-Default” there was a setting called “Fix Tile Pool Size” which is by default set to False. Once I set that to true, the navigation of the main level works when loading it from the start menu. Hope this helps someone as it took me a full day to solve this :slight_smile:

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5.4. Tried all of the above. The only thing that worked was putting it in the persistent level

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This worked for me in 5.4!

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I have similar issue. I’m using 1 level(Map) in 5.3 and World Partitioning. When I start at initial point and first world cell, the nav mesh is good. But when I move to the next cell, it’s not loading(all actors are being loaded but NavMesh).
I also went through tutorial. After build of Nav Mesh(step number 4), it stopped loading at all(even at initial point in Partitioned Map).

I don’t think setting generation level to Dynamic from Static is really good fix. It will affect performance and quality of nav meshes at some cases. There should be something with Static mode too.

This post has helped Nav Mesh and Streaming Levels - #2 by Swe08

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The problem is solved by placing RecastNavMesh on the main level (the one from which the game starts), for example, the “Main Menu”. Regardless of how you positioned the NavMeshBoundsVolume. I went to a map where AI movement was not working and deleted RecastNavMesh. Then I generated it in the main menu from which the game was launched. Everything works.

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buys you beer*

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I had the same problem I was loading my level from main menu and the AI wouldn’t move even though i had my navmesh mesh there. After searching for a long time i found this post.

Thanks a lot none of the other methods worked for me but your method worked perfectly.