Unreal Engine Issues
Unreal Engine Issues
Lumen Card Sharing is active on material with custom primitive data
UE - Graphics Features - Lumen - Aug 13, 2025The wrong emissive value may be used on Nanite objects with custom primitive data when Lumen card sharing is enabled. This issue can be mitigated with: r.LumenScene.SurfaceCache.AllowCardSharing 0 ...
Copying Gameplay Tag Queries uses paths of instanced objects.
UE - Gameplay - Gameplay Ability System - Aug 8, 2025Copying Gameplay Tag Queries (FGameplayTagQuery) in the editor uses transient instanced object paths, so will no longer be valid when the data is unloaded, making it difficult to save or share queri ...
DOF - TAA pass ghosting when using r.DOF.TAA.CoCBilateralFilterStrength
UE - Graphics Features - Aug 7, 2025In Unreal 5.6, there's a new CVar: r.DOF.TAA.CoCBilateralFilterStrength, which should help with ghosting artifacts introduced by TAA in DOF passes. However, it doesn't work as expected since many gh ...
ULevelInstanceSubsystem::CreateLevelInstanceFrom() is not honoring parameters bAlwaysShowDialog and LevelPackageName
UE - World Creation - Worldbuilding Tools - Level Instances - Aug 6, 2025A Level Instance or Packed Level Actor can be created through editor scripting by using function ULevelInstanceSubsystem::CreateLevelInstanceFrom(), which receives parameters packed in the FNewLevel ...
Interaction between sublevels and LevelSequences can break actors attachments hierarchy of the sublevel.
UE - World Creation - Worldbuilding Tools - Aug 6, 2025Having a LevelSequence opened and unhiding a sublevel can break the attachment hierarchy of the actors that are inside the sublevel. This also affects to the sublevel asset itself. ...
DataLayer: Duplication a GroupActor is broken
UE - World Creation - Worldbuilding Tools - Data Layers - Aug 5, 2025The result of the duplication operation is that the Actors in the new group are part of the DataLayer but the new GroupActor is not. ...
Environment Query System (EQS): EnvQuery runtime template object can be created with a non-unique name, corrupting the EnvQueryManager cache
UE - AI - Aug 5, 2025On file [Engine\Source\Runtime\AIModule\Private\EnvironmentQuery\EnvQueryManager.cpp:812], function UEnvQueryManager::CreateQueryInstance() uses StaticDuplicateObject() to create a new UEnvQuery* (d ...
FInstancedStruct does not serialise to JSON when used in a DataTable
UE - AI - Aug 4, 2025The JSON export functionality for DataTable relies on a FieldIterator to gather properties. This iterator is unable to gather the properties from the InstancedStruct. CSV export functionality works ...
SSR doesn't reflect Skydome Mesh/Material correctly in Vulkan mobile preview
UE - Platform - Mobile - Aug 4, 20255.6[Image Removed] 5.5[Image Removed][Link Removed] ...
SkinWeightsAsVertexMask in DeformerGraph does not respect SkinWeightProfile
UE - Anim - Rigging - Deformer - Aug 1, 2025The WeightBuffer passed to the shader does not reflect the SkinWeightProfile. The work around is : void FOptimusSkinWeightsAsVertexMaskDataProviderProxy::GatherDispatchData(FDispatchData const& In ...