Unreal Engine Issues
Unreal Engine Issues
Decal Fading parameters are completely broken
UE - Graphics Features - Sep 20, 2020Placed level instance causes "!ActorInstanceGuid.IsValid()" assertion after changing WorldSettingsClass
UE - World Creation - Worldbuilding Tools - Level Instances - Nov 13, 2023Resaving the level using ResavePackagesCommandlet is a workaround. ...
World Position is incorrect when used to control the opacity mask in a nanite spline mesh
UE - Rendering - Graphics Features - Feb 20, 2025When calculating the opacity mask, Nanite spline meshes do not have the correct World Position in the Material. This leads to visual artifacts when the mask relies on the world position. ...
Input Actions bound to Any Key become unresponsive after mouse scroll until scrolled again
UE - Gameplay - Input - Mar 28, 2025In UE latest release (5.5 launcher version), Enhanced Input Actions mapped to "Any Key" stop responding after scrolling the mouse wheel. Specifically, scrolling either up or down disables the Any Ke ...
Sequencer CR curve evaluating differently when navigating from parent sequence
UE - Anim - Anim in Engine - Mar 10, 2026Depending on whether I first open the level sequence that contains the control rig, or its parent level sequence, the animation curve will evaluate differently. ...
Regression for UPROPERTY specifier causing crash ("Template Mismatch during attachment") during PIE
UE - Foundation - Core - Jun 19, 2015If the UPROPERTY() specifier "VisibleDefaultsOnly" or "EditDefaultsOnly" is used on a component reference that is attached to the root component selecting the actor with this component in the world ...
Changing transforms to absolute in parent blueprint does not propagate to child blueprints in the level
UE - Gameplay - Blueprint - Oct 26, 2015If the transforms for a blueprint component are changed to "absolute" location and/or rotation, new child blueprints created will correctly show the absolute location/rotation changes, but the child ...
[CrashReport] UE4Editor-Core.dylib!<Unknown>
UE - Platform - Apple - Jan 13, 2016Crash Reporter Link: [Link Removed] User's description in Crash Reporter: Clicked on the + button to GameModeOverride in the World Settings panel. ...
Importing FBX file with same material slots and texture names has bugs
UE - Editor - Content Pipeline - Import and Export - Jul 31, 2020When importing a file from Blender, UE creates the correct number of materials, but the number of textures is incorrect and is being overwritten, and not importing the correct amount. Tested and re ...
Input consumed by a widget's action binding can be skipped if using key modifiers
UE - Gameplay - Input - Oct 29, 2021The following code in UPlayerInput::GetChordsForKeyMapping is at fault for this: !(KeyMapping.bAlt || KeyMapping.bCtrl || KeyMapping.bShift || KeyMapping.bCmd || ActionBinding.KeyEvent == EInputEv ...