# Navmesh has cracks in uneven landscape

**URL:** <https://forums.unrealengine.com/t/navmesh-has-cracks-in-uneven-landscape/2856116>\
**Category:** World Creation\
**Tags:** ai-navigation, unreal-engine, navmesh, question\
**Created:** [November 15, 2026, 7:26am UTC](https://forums.unrealengine.com/t/navmesh-has-cracks-in-uneven-landscape/2856116 "2026-11-15T07:26:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![HelioHsx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@HelioHsx](https://forums.unrealengine.com/u/HelioHsx)\
**Post date:** [November 15, 2026, 7:26am UTC](https://forums.unrealengine.com/t/navmesh-has-cracks-in-uneven-landscape/2856116/1 "2026-11-15T07:26:30Z")

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Hello,

I’ve got holes in the navmesh, mostly when bounds meet with each other. These holes prevent the AI from traversing there. I have tried changing many settings and nothing has helped so far. ☹ Sculpting the landscape helps a bit but doesn’t fully fix it. I would be very glad if someone could help me with this!

My cell sizes are: low → 40, default → 20, high -\>10

Tile Size UU is 1600. I have “fixed tile pool size” unchecked.

 ![Navmesh Issue 2](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/c/a/3ca1cda2e96ab4970e658314ad479142607037a4.png)

 ![Navmesh Issue 1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/2/1/221f7eebff1e68c72de03373810f5922645572ab.png)