Unreal Engine Issues

Mesh deformed by Cable Component does not output velocity

The velocity when moving the root is output, but it seems that the velocity for each deformation is not output. Since motion blur and TSR use velocity, problems such as ghosting may occur. ...

"Used with Particle Sprites" prevents material instances thumbnails from being editable

The thumbnails helpers will force material instances to be a plane, if their parent material is unedited. This can be worked around by editing the parent material, but editing the material instance ...

Sound Attenuation settings do not function when Allow Spatialization is False

Override Sound Attenuation setting does not work, Sound will play at max volume regardless of distance between source and observer. ...

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 ...