Unreal Engine Issues
Unreal Engine Issues
GAS: GameplayAttribute picker incorrectly also lists AttributeSets' non-attribute properties
UE - Gameplay - Gameplay Ability System - Aug 21, 2025Context: FGameplayAttribute's details customization lets designers pick any attribute property from any UAttributeSet class. Problem: This currently displays all properties of UAttributeSet class ...
Changing MaterialQualityLevel causes a crash due to a ShaderMap mismatch in UniformExpressionCache
UE - Rendering Architecture - Materials - Nov 26, 2025A crash may occur when changing the MaterialQualitylevel via Scalability due to a race condition. The issue occurs because in ScalabilityCVarsSinkCallback(), when it creates the FGlobalComponentRec ...
Cones for angular constraints not visible is Separate Translucency is disabled
UE - Graphics Features - Apr 14, 2016A user reported an issue where the cones that represent angular constraints in the PHAT editor are not rendered if Separate Translucency is disabled. This may be related to another issue with Separa ...
Undoing pasting a component will crash ([CrashReport] UE4Editor_CoreUObject!FWeakObjectPtr::IsValid() [weakobjectptr.cpp:48])
UE - Gameplay - Components - Jul 20, 2017This is a common crash affecting users in 4.16. The callstack is similar to [Link Removed], which was fixed in 4.13. User DescriptionsAccidentally duplicated a blueprint with multiple static mesh ...
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 ...
PostProcessSettings no longer has the Post Process Materials option
UE - Gameplay - Blueprint - Aug 29, 2017In engine version 4.17 and later the Post Process Materials node is not present. This option allowed for custom Post Process Settings. Other nodes are still present and working as intended. This iss ...
SceneColor in surface material ignores translucent objects
UE - Graphics Features - Sep 22, 2017Translucent meshes and particles behind an actor who's surface material uses SceneColor node are not rendered properly. Changing the view angle of the camera causes the translucent meshes to "pop" ...
Set relative location in construction script does not work when value is [0, 0, 0]
UE - Gameplay - Blueprint - Dec 11, 2017The Set relative location in construction script does not work when the value is [0, 0, 0] when used it does not set the location back when the specified component is moved, it does work for any val ...
Win64 - Unplugging audio device causes game to freeze
UE - Audio - Nov 30, 2017Win64 - Unplugging audio device causes game to freeze. Log is spammed with messages like the following after the device is removed:[2017.11.30-19.38.32:716][386]LogAudio: Warning: Waited 69.495094m ...
TransformVector node break compilation material instance but primary material is successfully compiled
UE - Graphics Features - Jan 31, 2018There is an issue occuring where TransformVector node break compilation material instance but primary material is successfully compiled. When using a custom node to set the value this node intends t ...