Unreal Engine Issues
Unreal Engine Issues
When open the persona editor only the first time, the OnAnimChanged event is called with the argument none asset
UE - Anim - Runtime - Aug 14, 2023OnAnimChanged did not seem to work correctly only the first time when opening the anim sequence and a PreviewScene was created. The OnAnimChanged event is supposed to notify which anim was changed, ...
Uncrouching a character on a physics object causes the character to penetrate the object only when physics substepping is enabled
UE - Simulation - Physics - Mar 10, 2020This does not repro when physics substepping is disabled. The sequence of events in the character uncrouch code (UCharacterMovementComponent::UnCrouch) causes the capsule to move up then increase i ...
Editor Crashes when copy/pasting an emitter in the Niagara timeline
UE - Niagara - Feb 8, 2023When creating the emitter's track widget we search for the stack view model's root entry, but the stack view model pointer is null, so we crash. ...
Matinee movie recording is broken in 4.10
Tools - Dec 18, 2015When trying to record a movie from a matinee in 4.10, it can fail for a number of reasons: 1. The folder does not exist 2. The cinematic view modes do not take effect 3. Trying to record a streamin ...
Ensure condition failed : Unprocessed LatentActions accumulate by SetPlaybackPostion using Play method
UE - Anim - Sequencer - Nov 9, 2021If some sequencer events are added to LatentAction queue while calling SetPlaybackPostion using Play method, the events will not be digested. So the LatentActions cause that ensure condition failed ...
Editor hang calling UMoviePipelineBlueprintLibrary::UpdateJobShotListFromSequence
UE - Anim - Sequencer - MRQ - May 14, 2025Within UMoviePipelineBlueprintLibrary::UpdateJobShotListFromSequence we are experiencing an editor freeze when launching an MRQ render of sequences where a camera is unable to find a valid possessab ...
Behavior tree subtree switch reported as hitching
UE - AI - Apr 4, 2016Setup described in UDN post: parent tree: root - selector - run behavior task subtree: root - sequence - custom BP task with just print string repro: print string message (engine tick) is showing u ...
Open Level node does not open the correct level in Packaged game
UE - Gameplay - Blueprint - May 30, 2017Open Level node does not open the correct level in Packaged game. Instead of loading the level named in the node, the node will just open the current level. This issue can cause problems with Matine ...
Alembic Caches Not Working With Lumen
UE - Graphics Features - Lumen - Jan 20, 2022It appears that Alembic caches do not influence Lumen's indirect lighting (except for shadowing). Alembic geometry caches should influence lighting in Lumen as any other geometry in a level. I hav ...
Adding NotifyTrack from AnimDataModifier doesn't refresh Animation Editor
UE - Anim - Runtime - Aug 12, 2020When creating a Notify Track using an Animation Modifier in the Animation tab of an Animation Sequence, the new Track added and applied fails to appear in the Notifies panel until the panel has been ...