Unreal Engine Issues

[AI] Crash while loading navmesh with async static mesh compilation enabled

I tried 10+ times but am unable to get this to reproduce locally. Licensee reports that this is a rare crash for them. ...

Foliage Instance Static Meshes do not affect the Navmesh

Foliage Instance Static Meshes do not affect the Navmesh. I tried changing the Custom Navigable Geometry to 'Yes' & 'Even if Not Collidable' but got the same results. Repro Rate: 4/4 Tested this i ...

Transformed convex collision generates wrong navmesh

[Link Removed] The mesh in the repro project contains a transformed convex collision, which can be moved freely in the mesh editor, so the transform must be applied in following code block. (Also se ...

"Navmesh needs to be rebuilt" error message while running a Listen Server and Client

Navmeshes produce a "Navmesh Needs to be rebuilt" error while running a Listen Server and a Client. ...

[AI] Compilation error when using const version of FNavigationPath::CastPath<PathClass>() const

Const version of function is not used elsewhere in the engine so it usually gets skipped when compiling. Produces the following error when compiling:  UnrealEngine\Engine\Source\Runtime\Navigation ...

Navmesh generation does not work in landscape in Lazy mode.

Path generated in wrong location from mesh in hidden sublevel

Variables changed in RecastNavMesh Generation tab do not save

Confirmed this issue in 4.25.4, 4.26, and 4.26.1 therefore it is not a regression. Uploaded logs from 4.25.4 and 4.26.1, the backup logs are before the restart (step 5 in repro steps) ...

Collision boxes always have Navigation Area Class reset to NavArea_Obstacle on project load

Every time when reopening the project, Nav Area Class on collision geometry gets reset to "NavArea_Obstacle", instead of maintaining its state. ...

Static shape components need to have Dynamic Obstacle set to actually use Area Class

Many licensees like to use ShapeComponents as blocking volumes instead of proper volumes, as they can be more easily placed and sized in the editor. The docs and code make it sound like it is possib ...