Unreal Engine Issues

A static mesh far from the origin appears to wobble in PIE

It seems that the numbers are rounded in VertexFactoryCommon shader. The cube consists of vertices that are very far from the origin and are placed on the screen by placing them at coordinates that ...

Welding doesn't work until the first time the actor simulates

Slate widget may incorrectly consume key up events causing some UI to get stuck

This is a bug reported from a UDN customer with a sample project and video attached that goes over the input consumption states and how they are incorrectly being set when changing UI modes ...

BoneList and BoneFilterActionOption in LOD0 of LODSettings are displayed after editing other LOD level

BoneList and BoneFilterActionOption in LOD0 of LODSettings are filters by the following code. void FSkeletalMeshLODSettingsDetails::CustomizeDetails(IDetailLayoutBuilder& LayoutBuilder) { ... st ...

Blueprint debugger: variable getter node displays wrong object's value

After triggering a breakpoint in blueprint, variable getter nodes can display the value of a different object than the node's target. For example: if an actor class has a value MyBool and the bluepr ...

Python does not always copy struct properties when there are differences

I noticed that some struct are not always copied in python. For example, FBox is not copied if !a_src.IsValid and !a_dst.IsValid even if Min and Max are different. Another example is FJsonObjectWrap ...

Logging out and then logging in as a new user results in slate creating multiple Slate User IDs

I believe this is happening because when you change your logged in user, the Slate Application will automatically create a new second slate user with an ID of 2. This is bad because the Slate App is ...

BP property initialization fast path does not handle non-instanced properties assigned to default subobjects correctly

Non-instanced object ref properties are incorrectly being skipped at property initialization time when Blueprint class instances are spawned with the fast property initialization path enabled. This ...

Per Instance Random node not working in material layer

Licensees report that the definition of the USES_PER_INSTANCE_RANDOM macro only considers it in the context of the base material.  As a result Per Instance Random used only in material layers does n ...

NiagaraComponent attached to the character won't stay active when travelling to a new level using seamless travel

The pawn character is added to APlayerController::GetSeamlessTravelActorList, so it'll be persisted during server travel. The Niagara component is spawned during BeginPlay and activated manually. W ...