Unreal Engine Issues
Unreal Engine Issues
FILTER_COMMANDLINE_LOGGING cannot be used without forcing UE_COMMAND_LINE_USES_ALLOW_LIST
UE - Core - Systems - Jul 30, 2024There'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 ...
Frustum culling provides inconsistent results causing particles to render even when the bounds are out of view.
UE - Niagara - Nov 5, 2024When the camera is just outside of the box bounds and it is angled directly away from it , it will start rendering the particles again (as determined by stat GPU differences) despite being out of vi ...
xDatasmith Direct Link models relocate on sync
TM - Interoperability - Jun 3, 2024Reported 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 ...
Provided example Control Rig Python scripts that feature calls to GetControlRigBlueprint need to be updated to GetControlRigAssetInterface.
UE - CAPT - Control Rig - Dec 9, 2025The 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
UE - Engine Scaling - Mass - Mar 30, 2026User 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 ...
SplineMeshComponent resources leak
UE - Rendering - Features - Aug 3, 2026A race condition occurs in the InitSplineVertexFactory_Internal }}function call, which is distributed across multiple threads. This causes {{FSplineMeshVertexFactory to be instantiated multiple time ...
Blueprints from UE4 with dangling delegate reroute node crashes on UE5 load
UE - Gameplay - Blueprint Compiler - Dec 22, 2023If a project from UE 4.27 or earlier has a blueprint with a reroute node dangling (no outgoing connection) from a Custom Event Node's delegate pin (red), this blueprint will crash when loaded in UE ...
Crash importing morph targets with animation and opening it in animation editor
UE - Graphics Features - Mar 31, 2017Lina encountered a crash when importing the attached FBX file with morph targets and animation, and then opening it in the animation editor. I was not able to reproduce this issue in QAGame (her re ...
"Set Animation Mode" creates multiple instances of the AnimBP
UE - Gameplay - Blueprint Editor - May 12, 2015Changing the Animation Mode repeatedly creates a new instance of the AnimBP being used every time you switch back to the Animation Blueprint mode. Example Project: [Link Removed] ...
BP Struct's 'Bool variable' will reset back to it's default value on compile
UE - Gameplay - Blueprint - Mar 18, 2015BP Struct's 'Bool variable' will reset back to it's default value on compile. ...