# Can't use Nav Mesh on Cesium terrain

**URL:** <https://community.cesium.com/t/cant-use-nav-mesh-on-cesium-terrain/18465>\
**Category:** Cesium for Unreal\
**Created:** [May 5, 2022, 3:13pm UTC](https://community.cesium.com/t/cant-use-nav-mesh-on-cesium-terrain/18465 "2022-05-05T15:13:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Greg2021](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/greg2021/32/3476_2.png) [@Greg2021](https://community.cesium.com/u/Greg2021)\
**Post date:** [May 5, 2022, 3:13pm UTC](https://community.cesium.com/t/cant-use-nav-mesh-on-cesium-terrain/18465/1 "2022-05-05T15:13:24Z")

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Hi,

i try to use AI Characters on a 3DTileset.  
Something like: [Unreal Engine Simple NPC Tutorial - YouTube](https://www.youtube.com/watch?v=SfnvbzfGZnE&list=PLK9H12ZcQhakqsFoZjfeCanVNel43bQYT&index=1)

Nav Mesh do not seems to work on 3DTileset.  
I have tried to use NavigationInvoker and i have the same problem.

Is it possible to use Nav Meshes with Cesium for Unreal ?

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**Author:** ![agallegos](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/agallegos/32/4464_2.png) [@agallegos](https://community.cesium.com/u/agallegos)\
**Post date:** [May 12, 2022, 7:50pm UTC](https://community.cesium.com/t/cant-use-nav-mesh-on-cesium-terrain/18465/2 "2022-05-12T19:50:00Z")

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Hi @Greg2021,

It doesn’t seem like it’s currently possible to generate navmeshes on 3D Tilesets. The issue is being tracked [here](https://github.com/CesiumGS/cesium-unreal/issues/327).

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<div class="post-metadata">

**Author:** ![janine](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/janine/32/5135_2.png) [@janine](https://community.cesium.com/u/janine)\
**Post date:** [April 5, 2023, 6:38pm UTC](https://community.cesium.com/t/cant-use-nav-mesh-on-cesium-terrain/18465/3 "2023-04-05T18:38:29Z")

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Hi @Greg2021,

As of v1.24.0, Cesium for Unreal supports generating NavMeshes on `Cesium3DTileset` actors, thanks to a community contribution! Here’s the [PR](https://github.com/CesiumGS/cesium-unreal/pull/1044) if you’re interested.