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

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 ...

Inaccurate motion vectors when using different position binding in renderer

Even though the particles are not moving, and the velocity is zero, the output motion vectors are non-zero. This seems to only happen if using two sources of particle positions.  ...

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 ...

UFE: Can't delete custom launch profiles

The confirmation message will fails spawning with the following messages in the log:  [2023.07.25-20.04.01:038][  0]LogWindows: Error: Failed to create dialog. The specified resource type cannot be ...