Levels can get stuck in the 'loading' state when using Incremental GC

UE - World Creation - Worldbuilding Tools - Jul 31, 2024

From licensee:"Testing incremental GC on our project we have ran into an issue with level streaming where levels will get stuck in the 'loading' state in packaged builds. The issue appears to be due ...

Foliage breaking when used Sublevels into a Persistent Level

UE - World Creation - Worldbuilding Tools - Foliage - Jul 31, 2024

Duplicating an imported socket wrongly displays the duplicate as also imported

UE - Graphics Tools - Modeling Tools - Mesh Editing - Jul 31, 2024

The duplication of an imported mesh wrongly marks it as also imported from the source mesh. The probable cause is data duplication without taking this edge case into account. I suggest checking Unr ...

Landscape Transparent with r.Lumen.DiffuseIndirect.Allow 0

UE - Graphics Tools - Terrain - Landscape - Jul 31, 2024

FILTER_COMMANDLINE_LOGGING cannot be used without forcing UE_COMMAND_LINE_USES_ALLOW_LIST

UE - CoreTech - Jul 30, 2024

There's two ways to affect the commandline in CommandLine.cpp: FILTER_COMMANDLINE_LOGGING - for filtering certain or all args (if left empty) from the log. UE_COMMAND_LINE_USES_ALLOW_LIST - for on ...

HideBoneByName translates bone to parent which breaks skinning

UE - Anim - Jul 30, 2024

Calling HideBoneByName on a bone causes that bone (and all it's children) to be translated to the parent bone's location.  This code in UpdateRefToLocalMatricesInner is responsible: bool bNeedToHid ...

Lumen Reflections in Stereo are broken after Nvidia GPU Driver Update

UE - Platform - XR - Jul 29, 2024

After updating the NVidia graphics driver to v.552.74+, reflective/mirror materials appear broken and render with black and white lines in VR mode if they are in a level with a Post Process Volume w ...

Cook Determinism - Construction Scripts and ChildActorComponent issues with DiffCooks

UE - Framework - Components - Jul 26, 2024

To step through the issue, in the -DiffOnly cook add a breakpoint to UChildActorComponent::OnRegister and UChildActorComponent::OnUnregister. It should hit 4 times:Once when LoadPackage loads the ma ...

Removal of ReplacementSceneComponent leaves trashed components during WorldPartitionResaveActorsBuilder

UE - World Creation - Worldbuilding Tools - World Partition - Jul 25, 2024

Running WorldPartitionResaveActors builder can detach attached actors. ...

Crash after generating HLODs for merged meshes that have all triangles culled

UE - World Creation - Worldbuilding Tools - HLOD - Jul 25, 2024