Unreal Engine Issues

"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 ...

Meshs in a hidden sublevel may generate incorrect navmesh

If the level has hidden sublevels, the regenerated navmesh result appears to have a hidden sublevel mesh placed at the origin. Apparently, the reason is that bNavigationRelevant is no longer consid ...

ICrowdAgentInterface.GetCrowdAgentGroupsToAvoid default implementation is missing one bit

Get polygon data via GetPolysInBox that are outside the box

GetPolysInBox should get only the polygons(FNavPoly) that are on the bounds of the box. However, there are cases where polygon data outside the bounds of the box is currently obtained. It gets polyg ...