Unreal Engine Issues
Unreal Engine Issues
Ensure condition failed: bPlayingBackwards ? (CurrentPosition <= PreviousPosition) : (CurrentPosition >= PreviousPosition)
zComponent - Archive - May 10, 2022The problem is caused by the animation sequence playback position being set out of range from Sequencer. The call stack is : UE4Editor-AnimGraphRuntime.dll!FAnimSequencerInstanceProxy::UpdateAnim ...
Dynamic (transient) material instance assignment lost if object spawnable
zComponent - Archive - Jun 21, 2024Material Instance Dynamic assigned to Spawnable objects with Editor Utility Widget get reverted when hit the Save button in Sequencer. This appears to come from the Material Instance Dynamic not be ...
A sampling result of DistanceFieldAOHistory is shifted to a wrong position.
UE - Rendering - Features - Aug 21, 2024DistanceFieldAOHistory introduces ghosting at low scalability and low screen percentages. This can lead to AO artifacts and a ghosting effect from the character. This issue was also observed on //U ...
The DistanceCurveModifier generates Distance Curves with zero values for Root Motion animations
UE - MVF Character - Animation - Jun 30, 2025The DistanceCurveModifier data modifier generates curves that return zero values only. This issue has been tested on several Animation Sequences with enabled Root Motion and always occurred. ...
Clipping bsp brush rotates clipped face on brushes that have their X,Y,Z values altered
UE - LD & Modeling - Modeling Tools - BSP - Sep 17, 2015If a bsp brush is rotated, then the brush clipping feature is used the "Brush Clipping" feature will rotate the created face by 90 degrees or disappear entirely (if set at an angle). ...
Game Instance being initialized twice in Android build
UE - Gameplay - Feb 11, 2015When a project with a C++ custom game instance is packaged for Android, the game mode is initialized twice from different paths. Device log files attached ...
LIVE: Multiplying an FQuat*FQuat via pass-by-value crashes editor on open
UE - Foundation - Core - Nov 5, 2014If a function takes in an FQuat value and then multiplies it by an FQuat, the project will build properly but then crash when trying to launch the project in the editor. Example project available b ...
Data Only blueprints Class Defaults page become uneditable during runtime
UE - Gameplay - Blueprint - Aug 7, 2015During runtime, a data only blueprint's class defaults tab becomes greyed out and uneditable during runtime. The values for specific instances can still be edited via the detail's pane. ...
Changing the Pin Type on the 'Select' node can cause errors with pins that have been split
UE - Gameplay - Blueprint - Jun 1, 2015Changing the Pin Type on the 'Select' node can cause errors with pins that have been split. ...
Distance Field AO leaving trail of occlusion shadow where character mesh has been.
UE - Graphics Features - May 21, 2015When using DFAO and moving around the world a trail will be left behind the where the player has been while PIE/Standalone game is being used. This is cleared when exiting these modes. **Video att ...