Unreal Engine Issues
Unreal Engine Issues
SColorGradientEditor Does Not Trigger OnCurveChanged Events
Tools - Feb 26, 2016User Description: "SCurveEditor, class which is used for float ramps, seems to trigger OnCurveChanged events for the underlying curve; however SColorGradientEditor (constructed by SCurveEditor) seem ...
NDisplay hangs and stops responding on cluster event send
UE - Virtual Production - nDisplay - Nov 12, 2019"The test event is set up using the default CE port, but every time an event is sent through the launcher the display receives the input and processes it, however the launcher will "hang" and stop ...
Linux editor can fail on start due to a stale TPS library in Engine/Binaries/Linux
UE - Platform - Linux - May 21, 2015For 4.8, we moved LinuxNativeDialogs, a third-party library, to a different location (and also changed its API somewhat, so the old library is binary incompatible). However, some users apparently a ...
When the particle system manager is enabled particle system components will always tick in start physics
UE - Niagara - May 24, 2019The particle manager only accounts for the particle system component's attach parent's EndTickGroup. When setting the tick group through the actor component the TickGroup is set instead of the EndTi ...
UMG Children broken in Build packaged with Nativization
UE - Gameplay - Blueprint - Aug 28, 2018Child widgets not visible when packaged with inclusive nativization on. "The problem is that ChildWidget never shows up in the package build, but shows fine in the editor. I've debugged the issue ...
Attach actor to actor with the transform set to snap to appears to offset when calling it multiple times on multiple actors
UE - Gameplay - Blueprint - Dec 13, 2016Attach actor to actor with the transform set to "snap to" appears to offset when calling it multiple times on multiple actors. ...
ApplyRootMotion**** ability tasks broadcast completion events before calling EndTask
UE - Gameplay - Gameplay Ability System - Mar 22, 2023Several ability tasks used to apply root motion sources on Characters have ordering problems between on-completion style events and ::EndTask / OnDestroy. UAbilityTask_ApplyRootMotionMoveToForce is ...
Light as If Static setting does not Persist when Re-opening Project
Tools - Apr 28, 2016This bug was originally entered back in 4.8 as [Link Removed], but was closed as by design. The reason was, the mesh did not have Lightmap UVs, so using the 'Light as If Static' option would not wor ...
Packaging Error When Setting Recast Nav Mesh Runtime Generation
UE - AI - Jan 25, 2016Setting the Runtime Generation on the Recast Nav Mesh to a different preset than what is set in the Project Settings causes an error to appear upon trying to package the project, and causes the pack ...
Multiple setter functions in UMaterialEditingLibrary always return false even when the parameter is correctly set on the MaterialInstance.
UE - Rendering Architecture - Materials - May 30, 2025In Unreal Engine, materials can expose parameters that can then be modified via instances (MaterialInstanceConstant). The UMaterialEditingLibrary provides several functions to modify these parameter ...