Unreal Engine Issues

Niagara problem with "Static Mesh Location" module

Changing MaterialQualityLevel causes a crash due to a ShaderMap mismatch in UniformExpressionCache

A 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 ...

Material picking of Nanite meshes with multiple sections not working

Picking 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

From 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

Global 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.

The 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

In 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

USkeletalBodySetup::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

It 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

A 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 ...