Unreal Engine Issues

Crash may occur if Actor is selected on the outliner and then discarded

Discarding Actor while it is selected on the outliner may cause a crash. This may be caused by operations from C++ not being listed in the UNDO list, which may refer to unreferenced objects during ...

Some Niagara Fluid systems render black with 'Extend default luminance range in Auto Exposure settings' enabled with SunSky

Some Niagara Fluid systems render black with 'Extend default luminance range in Auto Exposure settings' enabled with a SunSky in the level. ...

[AI] Gameplay Debugger input stops working when using console command to open debugger after opening the debugger with Apostrophe.

ModularGameplay and other runtime plugins have wrong LoadingPhase

Plugins that provide blueprint-accessible libraries generally need to be set the PreDefault LoadingPhase so they can be properly loaded before game-specific data that loads early in the Default load ...

Ensure occurs when RBAN simulated rigid body approaches UseComplexAsSimple mesh

When a collision enabled RBAN node attempts to collect surrounding meshes, if there is a mesh with UseComplexAsSimple, it will hit the Ensure when cloning a mesh on the task graph thread. Disabling ...

Runtime-generated components stored in the VisibleAnywhere array are not displayed in the detail panel

Runtime-generated components stored in ObjectPtr with VisibleAnywhere are displayed in the details panel, but not for arrays. Applying the following workaround, components can be visible even in ar ...

When 1 AnimSequence asset is used for multiple SeuqnecePlayer, the override by AnimGraphOverrides affects other than the specified SequencePlayer.

If you use the same AnimSequence in multiple SequencePlayers in Base AnimBP and replace asset of one of SequencePlayers by AssetOverride in Child AnimBP, the result will be reflected in the other Se ...

nDisplay failed to launch with a user name account which contains non-ASCII chars

Movie Render Queue Deferred Lighting(Detail Lighting) only outputs Lighting Only

This is not a regression. Tested in //UE4/Release-4.27 CL#18319896 Movie Render Queue Deferred Lighting(Detail Lighting) appears to only output Lighting Only.  ...

Physical Material Mask does not appear in the Material Instance Editor

Although MaterialInstanceConstant has a physical material mask and physical material mask map property, these properties does not appear in the Material Instance Editor's details panel. ...