Unreal Engine Issues

Lumen indirect lighting artifacts when far from world origin

Lumen seems to not be using Large World Coordinates somewhere. The Lumen Scene develops artifacts at large distances (5000 KM) from the world origin. ...

Add new Filter in ULevelStreamingPersistenceSettings to allow filtering a class (Component) only when its outer class is of a certain type/types

This requests comes from a UDN : [Link Removed] ...

Atmosphere Sunlight shafts, artifacts, for both cascaded and virtual shadow maps.

Very large objects casting dynamic shadows on the sky atmosphere can lead to flickering (cascaded shadow maps) or square patterns (virtual shadow maps). ...

Duplicated ChildActor on World Partition Streaming

The issue is encountered when streaming a world partition an actor with an AChildActorComponent which generates 2 instances instead of one when run as a client in the editor. This behavior does not ...

UDataTableFunctionLibrary::AddDataTableRow() fails for blueprint-defined row structure types

The editor-scripting blueprint node "Add Data Table Row" fails when the Data Table uses a Row Structure that was defined in blueprint. Internally, it checks if the passed-in UScriptStruct is derived ...

"StaticFindFirstObject: Ambiguous object name" on delegates with timelines in packed level actors

WPO is incorrectly generated on materials using Material Attributes as input to Landscape Layer Blend node

This comes from this UDN : [Link Removed] It occurs with this setup :  [Image Removed] , where Set Material Attributes expressions act as inputs to the Landscape Layer Blend material expression. ...

Keep Simulation Changes does not work for Actors that have replaced root component

RelativeLocation and RelativeRotation in the root component are collected in UActorComponent::AllUCSModifiedProperties, so copying simulation result is skipped in EditorUtilities::CopyActorPropertie ...

Breakpoints in BP Actor Construction Scripts can freeze the editor in several circumstances

Placing a breakpoint inside of the construction script of a blueprint Actor can cause the editor to freeze in some situations. The licensee has identified two such cases. The first is when opening ...

Widgets will bind input delegates to the Player Controller's Input Component, but never unbind them

This is a bug introduced with 18468289 a while ago. We added this functionality for [Link Removed], which allows input event nodes to be placed within widgets and have them behave correctly.  This ...