Unreal Engine Issues
Unreal Engine Issues
[AI] Navigation System can be constructed in situations where the NavigationObjectRepository subsystem is not valid
UE - AI - Navigation - Feb 7, 2025Investigate and fix all calls where the Navigation System is constructed without the NavigationObjectRepository subsystem being valid. ...
Cook errors with landscape cross-level spline meshes
UE - LD & Modeling - Terrain - Landscape - Dec 18, 2015Licensee is using a modified engine but has a workaround, we need to verify that the same doesn't happen in vanilla UE4 and fix if it does. ...
T_Wood_Pine_D Asset has Offset Alpha Channel
Docs - Samples - Sep 12, 2016The alpha channel seems to be offset in the x and y by 1024 pixels this has been fixed and attached for analysis. ...
Some Niagara Fluid systems are not visible in a packaged project
UE - Niagara - Jun 7, 2022Previously packaging caused a crash with this system. This was fixed, but now the system is no longer visible when packaged. ...
Route gamepad to second window setting is broken
UE - Gameplay - Input - Nov 11, 2022The RemapControllerInput function call likely needs to be added back to the game viewport client as a fix. ...
WorldPartition: Attached Actors within Level Instances save level offset bounds
UE - World Creation - Worldbuilding Tools - Level Instances - May 9, 2023The proposed fix is implemented in CL 25389340 but needs further testing to make sure there are no issues caused by it. ...
WorldPartitionActorDescs for LevelInstanceActors are broken when migrating world partitioned level
UE - World Creation - Worldbuilding Tools - Level Instances - Jun 13, 2023WorldPartionActorDescs will be restored to the correct properties when resaved. They can also be fixed by the WorldPartitionResaveActorsBuilder commandlet. ...
CreatePatchLibrary is broken
UE - Rendering Architecture - Shaders - Nov 12, 2025It seems the FEditorShaderCodeArchive.LoadExistingShaderCodeLibrary missed some functions, use FEditorShaderCodeArchive.AddShaderCodeLibraryFromDirectory instead could fix the issue. ...
Behavior tree assets marked dirty when opening in subeditor
UE - AI - Aug 16, 2016Found while I was fixing up other content, that Behavior Tree assets are being marked dirty by just opening them into sub editor. ...
Performance regression from 4.10 to 4.11 on Sony Xperia M4 Aqua
UE - Platform - Mobile - May 27, 2016User reports that on the Sony Xperia M4 the FPS have decreased from about 25 down to 5 after upgrading to 4.11. ...