Unreal Engine Issues
Unreal Engine Issues
If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible
UE - Virtual Production - Tools - Jul 31, 2025If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible. The behavior only shows after d ...
Crash when clicking "Reset to Default" button on the Details Panel for the MaterialAttributeLayers material node.
UE - Rendering Architecture - Materials - Jul 15, 2025This crash repros from at least UE 5.3 and up to latest. The following assert is hit: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 1067] Array index out of bounds: 0 in ...
Stationary light shadow are occluded for additional players in split-screen mode
UE - Graphics Features - Jun 17, 2015When using split screen multiplayer the second or more players that are added for split screen will have their characters shadows occluded when the bounds are not within view of player 1. Setting ...
Moving or changing the name of a project's GameInstance will switch the Game Instance Class to None and crash launched games
UE - Foundation - Core - Nov 26, 2014If the GameInstance set in Project Settings > Maps & Modes > Game Instance Class is renamed or moved to another folder, the Game Instance Class is switched to None. This causes a launched game to cr ...
Cannot use multiple SubScene tracks
UE - Anim - Sequencer - Jun 30, 2016Cannot use multiple SubScene tracks. When trying to add a subscene to a second subscene track, it just snaps onto the original subscene track. ...
UMG: Crash When playing an animation with the Same Name as a Widget
UE - Editor - UI Systems - Feb 22, 2016Editor crashes when a UMG widget (Text block, whatever) and an animation track share the same name and the animation is played. NOTE: The Editor will not allow you to name a Widget the same as an a ...
Full Scene Importer resets overrides when reimporting asset
UE - Editor - Content Pipeline - Import and Export - Jul 5, 2016When using the Blueprint Hiearchy Type for creation on the Full Scene Importer if you've previously imported and set some of the settings like the Override Lightmap Resolution via the BP and then re ...
Changes to a Spline will reset if the Spline Component is renamed
Tools - Sep 17, 2015Changes to a Spline will reset if the Spline Component is renamed User Description: Spline reset after rename The spline, nicely edited and long, got reset to the default after I've renamed the s ...
A vehicle using Async Scene on the body but not the wheels will crash the editor
UE - Gameplay - Aug 4, 2016A vehicle using Async Scene on the body but not the wheels will crash the editor[EUS-TJ Ballard] Vehicle using Async Scene on body but not the wheels crashes the editor User Description: Async sce ...
Ribbon Emitters Do Not Properly Kill Trails On Source Loss
UE - Graphics Features - Nov 18, 2016"Dead Trail on source lost" doesn't seem to work consistently. This is apparent when the source emitter's duration is longer than the particles being emitted. This bug also occurs if there is vary ...