Unreal Engine Issues
Unreal Engine Issues
Artifacts appear on translucent particle systems during camera motion blur
UE - Rendering Architecture - Jul 23, 2025Translucent particle systems exhibit visual artifacts when the camera moves, even though motion vectors are disabled for the particle emitters. While switching the Translucency Pass to "After Motio ...
Certain particle effects in ContentExamples pause when looked at on Mac with Metal
UE - Platform - Apple - Aug 20, 2016Certain particle effects in ContentExamples stop playing when looked at from a specific angle. The affected demos are 2.1, 2.4, 2.5, and 2.7 Seen on an Nvidia MacbookPro and AMD MacPro Does not o ...
Adding Multiple Scene Components to an Actor Causes Parenting Errors
UE - Gameplay - Components - Jan 5, 2016Attempting to add multiple instances of a Scene Component that was created in code and contains a component such as a Box Collider causes the Box Colliders of each Scene Component to be parented to ...
Blueprint icon flashes when hovered over
UE - Editor - Content Pipeline - Content Browser - Mar 24, 2015Blueprint icon flashes constantly when mouse is hovering over it; this only occurs with a specific type of blueprint class. . Branch: Binary, from Launcher . Build Version: 4.7.3 . Description: T ...
Skylight has too much influence on Subsurface Scattering
UE - Graphics Features - May 9, 2017Users on the AnswerHub are reporting that Skylights have too much effect on Subsurface Scattering. The argument here seems to be Movable Skylights versus Static/Stationary and their results regardi ...
Unable to Expand the Class Dialog Menu on Mac when Creating New Blueprint Class
UE - Platform - Apple - Apr 24, 2015Unable to reproduce internally. The user is unable to expand the class dialog menu when creating a new blueprint class on his Mac. He provides a video showing the issue he is experiencing in 4.7.5 ...
Overridden functions in Child Blueprints cannot be converted to/from pure functions
UE - Gameplay - Blueprint - Jun 27, 2015Overridden functions in Child Blueprints cannot be converted to/from pure functions. Reproduced in 4.8.1 and Main (//depot/UE4/Promotable-CL-2601051) ...
Find Collision UV Returning Unexpected Values
UE - Gameplay - Jan 19, 2017Find Collision UV is returning values that are above 1.0, when it is expected that these values would remain between 0 and 1. ...
[Waveform Editor] - Changing the Edit time on a Sound Wave that has TotalSamples=0.0 can crash editor
UE - Audio - WaveformEditor Plugin - Nov 10, 2022Rapidly changing the End Time on an asset that has TotalSamples=0.0 in the WaveFormEditor cases the editor to crash. Work around is to reimport the asset, which will restore that value. The crash hi ...
Moving a Copy of an Actor from Persistent to Sublevel Dirties Persistent Level
Tools - Aug 18, 2017Using Alt-Drag to move a copy of an actor from the persistent level to a sublevel (when the sublevel is selected as the current level in the Levels window), the persistent level is getting marked as ...