Unreal Engine Issues

Sequencer events with a payload of struct containing Object do not work

A structure containing Object as a parameter is misrecognized as a single Object and loses the parameter. This behavior was brought in by CL-27785664. ...

UV issues using Procedural meshes

From licensee: We build our procedural meshes using C++ and we checked our UVs used to fill the UV array before applying the CreateMeshSection method. The UVs seems to be correct however the result ...

The "Make Static Mesh" feature for skeletal meshes does not account for disabled mesh sections.

The licensee was not able to make static meshes with the correctly disabled sections from a skeletal mesh in the current implementation of the "Make Static Mesh" button in the editor. They have prov ...

Runtime Virtual Texture rendering can allocate more FRDGBuffers than expected

When rendering runtime virtual texture pages without throttling (when r.VT.MaxUploadsPerFrame is high or during Movie RenderQueue captures) the number of FRDGBuffers allocated by the Render Graph Bu ...

Modifying the properties of a ChildActorComponent in a child blueprint can modify the parent actor ChildActorComponent properties.

When a property of a ChildActorComponent is modified in a child class, the parent ChildActorComponent class can also get modified. This happens when the Parent blueprint actor has a ChildActorCompo ...

Improve performance when creating multiple Data Layer Instances

Every time AWorldDataLayers::CreateDataLayer is called,  UDataLayerManager::ResolveActorDescContainersDataLayers() gets called and iterates on all actordescs of the world.When creating multiple data l ...

Swapping the C++ Root Component from a Child BP class, pressing Save, Compile, but not Saving afterwards, will leave the Root Component in a locked state, meaning the it cannot be viewed or edited in the Details Panel after an Editor restart

Swapping the C++ Root Component from a Child BP class, pressing Save, Compile, but not Saving afterwards, will leave the Root Component in a locked state, meaning the it cannot be viewed or edited i ...

Issue with PLA Editing inside another PLA causes Z-Fighting or Mesh Disappearance.

When editing a Packed Level Actor (PLA) that is inside another PLA, z-fighting or mesh disappearance will occur. More specifically, it is seen when duplicating a mesh inside the PLA, upon saving the P ...

Volumetric Lightmaps Disappear After Building Levels

Editor Crash When Using FRequestPlaySessionParams GlobalMapOverride To Load World Partition Map

The licensee has been using a custom CVAR to launch directly into PIE for a world partition level. Since updating to 5.4, this now causes an editor crash. The main factor appears to be whether or no ...