Unreal Engine Issues

Oodle CompressionLevelNameMap is missing an entry for Optimal5, leading to a crash in the texture editor

Due to a missing string in CompressionLevelNameMap in OodleDataCompression.cpp, it is possible for LevelName to be left uninitialised after parsing the compression effort, which causes a crash when ...

Interchange: Static analysis fix for interchange manager

Interchange: Dialog import preview pipeline is missing the import context

We need to call TransferAdjustSettings on the duplicated pipelines to execute the preview import. ...

Level Sequence Actor- bTickWhenPaused is unsettable from the details view

See UDN here: https://udn.unrealengine.com/0D5QP00000TtFaV0AV?fromCase=1 The issue is that in FMovieSceneSequencePlaybackSettings, the TickInterval struct is marked with an EditCondition to only be ...

Sequencer: Undoing creation of a new section can call section drawing code with viewmodel tree in invalid state

The Section reference in ISequencerSection::GetSectionHeight can be in the process of garbage collection during an undo of a section addition- this causes things like GetTypedOuter<UMovieSceneTrack> ...

UE 5.4 - Specular/reflection disappears above 4096 resolution render

After a viewport is more than 4096 pixels wide, Lumen's specular reflections buffer cuts its width off at 4096 pixels. It appears that the affected buffer is "Lumen.Reflections.ResolvedSpecularIndi ...

Logic error in TRange::Difference causes crash when you Trim and Preserve Left/Right and unbounded Attach section in the sequencer

TRange::Difference function does not handle bounds correctly, causes crash in the sequencer when "Trim And Preserve Left/Right" is used in the user's example project. User provided a potential fix: ...

Sequencer - Soft References do not work as payloads in Event Track keys, the endpoint event receives none/empty instead

In sequencer, an "event track" can be added to call functions/events defined in the Sequence Director Blueprint. The parameters for those endpoint functions/events can be sent as a Payload associate ...

Landscape.Nanite.MaxSimultaneousMultithreadBuilds hangs indefinitely

It's possible for NaniteStaticMeshesInFlight to never be decremented because all the background workers are waiting indefinitely for the ones in flight to complete their static mesh build.  ...

Cooker: NeverCookPackageList should store packages as LongPackageNames instead of filenames, to save memory by avoiding creation of FName for each external actor package

GetNeverCookPackageFileNames among other things adds every external actor package to NeverCookPackageList, even if they are not referenced by the rest of the cook. Since it stores the packages in th ...