Unreal Engine Issues

Level Sequence spending long time validating assets

Hi After migrating our animation project from 5.7 -> 5.8 we notice that some level seqeunces take much longer to save (during validation stage). This issue only exhibits when using control rigs in ...

Sequencer Crash (GC Leak) in Editor

A GC leak, similar to the one fixed by 44483919 but for Level Sequences in Level Instances rather than ones with Widgets. A Level Sequence Actor in a Level Instance points to a Level Sequence Asset ...

[Mutable] Morph Targets can be disabled in packaged builds when Mesh Streaming is enabled

When a Mutable mesh instance is created while the actor spawns at a distance, only the low LODs are generated, and the mesh is created with no Morph Targets registered. Later, when the camera approa ...

Editor crash when an unsupported material domain or blend mode is selected when previewing a Nanite mesh in the material editor

Fix in UE6: 56133257 This Jira is for 5.8.3 tracking ...

All UKismetStringTableLibrary public method visibility unexpectedly changed from public to private.

Cannot get Texture Size property from Texture Collections

The following error is shown when attempting to use the Texture Size of a Texture Collection texture object: Texture size only available for Texture2D, TextureVirtual, Texture2DArray, VolumeTexture ...

MRG - Cinematic Assembly Tokens From Metadata Return Empty When Rendering

Metadata defined on a Cinematic Assembly isn’t accessible as naming tokens when rendering with Movie Render Graph. Global naming tokens defined outside of a Cinematic Assembly does work but context ...

Object Mixer shows actors the World Outliner hides (5.8 is incompatible with 5.7-and-earlier behavior)

For the same project and the same filter, Object Mixer returns a different set of actors on 5.8 than it does on 5.7. Actors that the World Outliner hides now appear in the Object Mixer list. Editor ...

MID TextureCollections don't work with Post Process Overlays

TextureCollectionParameters in a material assigned to a Post Process Overlay are not overridden by a MID because CopyInterpParameters in Engine\Source\Runtime\Engine\Private\Materials\MaterialInsta ...

Unable to kill UnrealBuildTool, UBT no longer propegates sigterm

When UBT is launched through one of the standard wrapper scripts, Ctrl-C no longer cancels the build. The `dotnet UnrealBuildTool.dll` process and its compile actions keep running to completion in t ...