Unreal Engine Issues
Unreal Engine Issues
Material picking of Nanite meshes with multiple sections not working
UE - Graphics Features - Nanite - Nov 24, 2025Picking a material of a section of a Nanite enabled mesh will not work correctly, while the same picking logic works fine for non-Nanite meshes. On Nanite meshes, the reported section index seems to ...
Orphaned BP actors when using UWorldPartitionBuilder
UE - World Creation - Worldbuilding Tools - World Partition - Nov 21, 2025From an EPS case: --------------------------------- We're seeing a recurring issue where child BP actors are becoming orphaned during any processing that uses UWorldPartitionBuilder. It affects ...
[AI] Unable to bind to parameter properties when using a Soft Object Reference
UE - AI - StateTree - Nov 21, 2025Global parameters disappear from the binding list when a soft object reference is present. Pulling up the binding menu shows nothing for Parameters when there are only object references in the ST as ...
Duplicating OFPA Levels can result asserts when running the WorldPartitionBuilderCommandlet on multiple levels.
UE - World Creation - Worldbuilding Tools - World Partition - Nov 21, 2025The process will assert in UWorldPartition::Initialize on check(!OuterWorld->PersistentLevel->bAlreadyMovedActors); The log from a debugging session (see attached image) that a LevelInstance ge ...
ScreenshotCapturedDelegate is never called in HDR
UE - Platform - Console - Nov 21, 2025In UGameViewportClient::ProcessScreenShots, when bHdrEnabled is true, the Bitmap array is never filled (the capture code uses BitmapHDR), so ScreenshotCapturedDelegate is never called for any custom ...
same PhysicsAsset refresh multi times when modify multi SkeletalBodySetup properties in same PhysAsset
UE - Anim - Gameplay - Nov 20, 2025USkeletalBodySetup::PostEditChangeProperty will call OwningPhysAsset->RefreshPhysicsAssetChange(), if I modify many SkeletalBodySetup properties in same PhysAsset, will cause call OwningPhysAsset-> ...
Groom assets can no longer be created without curves data
UE - Graphics Features - Nov 18, 2025It used to be possible to create an empty Groom assets without an Alembic file. However, this is no longer possible because curve data is required This workflow is useful to create grooms that onl ...
FInstancedStruct member uproperties are not cached when "Generate Optimized Blueprint Component Data" is enabled
UE - Framework - Blueprint - Nov 18, 2025A licensee has encountered an issue where their FInstancedStruct isn't being gathered into CachedPropertyData when "Generate Optimized Blueprint Component Data" is enabled. The changes in [Link Remo ...
[AI] SmartObjectPersistentCollection produces errors during Map Validation
UE - AI - SmartObject - Nov 18, 2025SmartObjectPersistentCollection in 5.6 and later now give errors when the map validator runs due to referencing spatially loaded actors. This was working per licensee in 5.5. There was a change from ...
DataAsset blueprints have the wrong NativeClass
UE - Gameplay - Nov 18, 2025UDataAsset's constructor assumes itself to be the native class, and caches that value for use by the asset registry. However, if the data asset type is defined in a blueprint (i.e. subclassing UPrim ...