Unreal Engine Issues

[AI] Navmesh does not generate correctly on a plane that has a slope of 45 degrees or more.

Navmesh generation appears to have issues handling terrain and planes that are at 45 degree or steeper angles even if the agent max slope is set to allow for such movement. While the issue occurs at ...

[AI] Navmesh does not generate correctly on a negatively scaled ISM.

Setting a single axis of an ISM negative results in navmesh not being generated on top of it. However, setting 2 axes to negative scale does have the navmesh generate as is expected.  Also see more ...

[AI] NavModifierComponent includes non-navigation relevant primitive components in its navigation bounds calculation.

If an actor contains multiple primitive components, it uses all of them for calculating navigation bounds even if some of the primitives are not marked as navigation relevant. Toggling navigation re ...

[AI] Navmesh does not load/give a warning when a World Partitioned navmesh is in a non-World Partitioned map.

[AI] PathFollowingComponent HasReachedInternal always returns false if agent's capsule height is 0 or nearly 0.

The result is that nothing states why the path returns blocked or pathfinding stops. There should be a log of at least a warning about the improper capsule setup. ...

When SimpleLink and SmartLink are enabled, CustomLinkId is sometimes missing.

If trying to find NavLinkProxy with SimpleLink and SmartLink enabled by searching the path,  sometimes CustomLink is not found (CustomLinkId=0). Since only one NavLinkProxy is located on the level, ...

[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. ...