Unreal Engine Issues

Common UI/Enhanced Input UI action binding issue

They've nailed it down to the following logic FUIActionBinding::TryCreate which doesn't check for the InputAction specified.// Make sure there is no existing binding for the same action associated w ...

Transient Subclasses of ABrush default to supporting external packaging

ABrush::SupportsExternalPackaging overrides the base implementation of  AActor::SupportsExternalPackaging which returns false for transient actors, but it doesn't call super. As a result, transient ...

Sequencer: muting transform's location/rotation/scale not working

UPlacementSubsystem can return unintended factories from FindAssetFactoryFromAssetData

Factories registered to the PlacementSubsystem using  UPlacementSubsystem::RegisterAssetFactory will always be added to the end of the AssetFactories array. Which means if there are any existing reg ...

Mass Agent Component implementation triggers Aggressive Default Reference Replacement ensure

Workaround: Construct the DefaultSubobject with ... = CreateDefaultSubobject<UMassAgentComponent>(TEXT("MASS"), true); The issue appears to be that the DefaultSubobject holds a pointer to the CDO ...

Contact shadow has box artifacts with backlighting for two sided Subsurface shading model

See slack channel: [Link Removed] ...

Luminance coefficients used throughout the engine not matching sRGB standard

This is causing confusion when working with color in UE5, specifically when validating for HDR between different reference materials. It has also been noted that the color primaries in PAL and NTSC ...

FColorSpaceTransform Crash on Linux due to misalignment

FLinearColor FColorSpaceTransform::Apply(const FLinearColor& Color) crashes while attempting to VectorLoadAligned() when running the UnrealEditor on Ubuntu 22.04. ...

Replace Transform Track setting not used when importing FBX through scripting.

Importing the fbx uses the default settings, which aren't accessed through scripting, so they cannot be changed. To circumvent this  MovieSceneToolHelpers::ImportFBXIfReady caches the defaults, and ...

Performing seamless server travel while a Legacy Camera Shake with an Anim Sequence set is ongoing will cause a crash

When we server travel with seamless travel enabled, and a legacy camera shake with an anim sequence set is currently ongoing, we will get a crash due to the UMovieSceneEntitySystemLinker failing a c ...