Unreal Engine Issues
Unreal Engine Issues
Hardware Lumen Surface Cache Artifacts on Nanite Geometry
UE - Graphics Features - Lumen - Sep 1, 2025When using Hardware Lumen with Nanite-enabled meshes in UE 5.6+, black / dark surface cache artifacts appear that result in generally darker and unstable lighting. These artifacts are not immediatel ...
[MetaSounds] - Input Parameter Settings revert to the default after a MetaSound becomes virtual
UE - Audio - MetaSounds - Sep 23, 2022On restarting from Virtualizing, any parameters set previously on a MetaSound are ignored and the MetaSound restarts with the default values. This does not behave this way with Sound Cues, in which ...
Play options menu vanishes sometimes
UE - Editor - Applied Usability - Oct 8, 2024There seems to be something wrong with how we close menus and submenus as submenus are opened and closed based on mouse interaction. In particular, we seem to sometimes close the whole menu hierarch ...
Android Client unable to join VOIP Host Session
UE - Online - Aug 6, 2019Android client is unable to join a VOIP Hosted Session. The following messaging occurs when the Client tries to join a found session on Android:LogInit: BSD_Android: I am localhost (127.0.0.1:0) L ...
Waking both of a constraint's rigidbodies re-enables collisions between constrained actors that were disabled by a Physics Constraint Actor
UE - Simulation - Physics - Solver - Apr 12, 2022Waking both of a constraint's rigidbodies re-enables collisions that were disabled by the physics constraint You can also get this issue to occur by either shooting the two cubes around a bit, or by ...
Movement corrections occurring while standing still on rotating platforms
UE - Gameplay - Player Movement - Oct 5, 2022When the player is controlling a Character actor, using the CharacterMovementComponent (CMC), unexpected movement corrections will occur while standing still on a movement base that is rotating. ...
Some Niagara FX does not show up in MovieSceneCapture when AgeUpdateMode is DesiredAgeNoSeek
UE - Niagara - Cinematics - Sep 17, 2024CL23957356 changes how to calculate FrameOffset in FNiagaraSystemUpdateDesiredAgeExecutionToken::Execute(). After this change, DesiredAge + FrameOffset could be 0.0 for some a couple of initial fram ...
Crash when loading array of UStructs containing Instanced property
UE - Gameplay - Blueprint - Jan 26, 2022The editor crashes with a failed assertion when opening a blueprint actor that contains a structure with instanced objects. ...
Animation Blueprint does not update in editor if ActorComponent UProperty is changed while ActorComponent is selected on placed Actor
UE - Gameplay - Components - Apr 14, 2020At editor-time (ie, while using the editor and NOT in a PIE session), the Animation Blueprint's ability to read updated values appears to depend on what component of an Actor is currently selected, ...
Subobject components do not have undo functionality within the level
Tools - Jan 4, 2021When moving these components around in the world editor, the transform gizmo will move with the undo, but the actual component will not. I could not repro this behavior with non-native component ...