Unreal Engine Issues

Bone LOD preview doesn't get update if change removed bones array directly in Skeletalmesh editor

Bone LOD preview should be correspond to the removed bones array changing The licencee wants to use same bones lod setup for those skeletalmeshes which are all sharing same skeleton via copying and ...

Material PDO Usage Incorrectly Checked

Seems when an expression output is swizzled (Typically via component mask) we lose the ability to track if the value is constant. This causes the IsPropertyUsed check to fail, potentially falsely ac ...

References to original assets/widgets are left behind when replacing them in UMG

Deferred spawned actors can receive BeginPlay before they are finished spawning

Actors that are deferred spawned on BeginPlay can be added to the world while AWorldSettings::NotifyBeginPlay is still iterating the world's actors and dispatching BeginPlay. AActor::DispatchBeginPl ...

Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location

Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location. When that flag is true, the moment the GeometryCollection (GC) ...

Type Promotion nodes should cache pins that have had their type manually converted by the user

[Link Removed] We should just cache any user-converted pins on the type promotion nodes and make sure to keep those types if they are valid. If they are invalid, then we can orphan them or someth ...

Subobjects can change sorting order in Blueprint Subobject Editor

Subobject sorting is not stable in the Subobject editor, so the UX is bad if you are creating complex hierarchies because it's difficult to keep track of newly added or reordered components. ...

Subobject editor collapsed nodes are auto expanded when adding or moving a node

Node operations cause all of the collapsed nodes to be auto expanded. This is disruptive when working with complex hierarchies because you can't hide irrelevant components. ...

The hair shading near the screen edge becomes whiter if only a skylight applies

This appears to be an issue with Lumen, with some off-screen information making its way on-screen during an upsampling pass. We checked a Renderdoc capture and that is where it seems to come from. ...

Displacement + TAA causes "vibrating"/"buzzing" artifacts

There is a buzzing artifact on shadows that is seen in the provided test project. The problem seems to be far more subtle when VSM is turned off. Licensee mentions that turning r.Velocity.ForceOutpu ...