Unreal Engine Issues

Layered blend per bone node with blend mask setting in an animation BP will not work after restarting UE editor, until recompiling the anim BP manually.

Media Playback - PNG Image Sequence Crashes Editor

The attached 105 frame PNG image sequence ( 1920x1080 w/alpha ) crashes the editor in UE 5.3 and 5.4 when played in the media player or in a MediaPlate.   The same image sequence does not crash the ...

FILTER_COMMANDLINE_LOGGING cannot be used without forcing UE_COMMAND_LINE_USES_ALLOW_LIST

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 ...

xDatasmith Direct Link models relocate on sync

Reported by multiple users. Models imported through Datasmith Direct Link can be relocated after a sync, despite no edits to the geometry's location in the DCC program. Currently reported for both ...

LODs with screen size 0 in legacy assets are incorrectly converted to 1 on load

When loading a mesh asset (static or skeletal) created in an old version of Unreal (e.g. 4.10), any LOD whose LOD screen size was originally set to 0, is converted to 1. This causes LODs that would ...

Provided example Control Rig Python scripts that feature calls to GetControlRigBlueprint need to be updated to GetControlRigAssetInterface.

The unreal.ControlRigContextMenuContext.get_control_rig_blueprint() this function has been deprecated in Unreal Engine 5.7. As a result, the Python scripts included with the Control Rig plugin no ...

Incorrect CRC hash for shared fragments with FInstancedStruct member

User has encountered an issue with shared fragments that contain a member variable of type FInstancedStruct. It appears that UE::StructUtils::GetStructInstanceCrc32() does not correctly compute the ...

Crash on packaged dedicated server when a uproperty is marked as both replicated and editor-only

In some situations, it can be useful to have a replicated editor-only C++ property (For example, the user that reported this issue was attempting to replicate settings to the client for game designe ...

Editor crashes on Mac when launching with the command -MacExplicitRenderer=0

Trying to launch the editor with the command -MacExplicitRenderer=0 causes a crash. At the time of the crash, the following line appears in the log:LogMac:Error: appError called: Assertion failed: A ...

ConstructorHelpers::FObjectFinder failing to compile with UPaperFlipbook

If ConstructorHelpers::FObjectFinder is used with UPaperFlipbook as its class specifier, compiling the code fails with the following error: Error C2664 'void ConstructorHelpers::ValidateObject(UObj ...