Cooker Generated Packages: Actors can trigger the "load" of generated packages from linker load and load them incorrectly

UE - Foundation - Data Pipeline - Cooker - May 31, 2023

Generated packages have to be constructed by the cooker via FGeneratorPackage::CreateGeneratedUPackage. Some fields on the UPackage are set and ICookPackageSplitter->PopulateGeneratedPackage is call ...

Visual Noise on Thin Translucent materials with a Directional Light

UE - Graphics Features - May 30, 2023

Regression in testing This occurs with hardware and software ray tracing, as well as moveable and static lights This occurs regardless of anti aliasing. This was tested with DX12 ...

AutoCreateRefTerm UFUNCTION meta specified can interfere with function default arguments

UE - Framework - Blueprint Editor - May 25, 2023

Example function provided by the user:.h UFUNCTION(BlueprintCallable, meta = (AutoCreateRefTerm = "TestInt,TestName")) static void TestAutoRefs(const int32& TestInt = 2, const FName& TestName = ...

Cannot assign a MediaTexture asset to a Brush -> Image in Widget Blueprint

UE - Virtual Production - Media - May 23, 2023

Can't assign Media Texture assets to the Brush->Image property in Images on Widget Blueprints. This workflow is explicitly mentioned as a step in these docs, so if this is no longer the correct meth ...

Merge Actors Tool Simplifies Nanite Meshes

UE - World Creation - Worldbuilding Tools - Merge Actor - May 19, 2023

Tried every combination of LOD Selection Type, Nanite enanbled/disabled, the only way it would seem to get the full number of triangles from the source mesh into the merged mesh is to disable Nanite ...

Instanced properties do not update in actors placed in a level that is not currently open

UE - Framework - Blueprint - May 17, 2023

The user is specifically having a problem with TArray<TObjectPtr<>> however I have also reproduced this error using a single TObjectPtr<>, raw uobject pointers & all three previous methods within a ...

LevelInstance: Brush actors don't follow transform

UE - World Creation - Worldbuilding Tools - Level Instances - May 16, 2023

WorldPartition: Attached Actors within Level Instances save level offset bounds

UE - World Creation - Worldbuilding Tools - Level Instances - May 9, 2023

The proposed fix is implemented in CL 25389340 but needs further testing to make sure there are no issues caused by it. ...

Widget defaults not updated when modified on a base widget class via the hierarchy

UE - Editor - UI Systems - UMG - May 3, 2023

A licensee has reported an inconsistency in how modified base widget class defaults are propagated to children. When modified via the UMG Designer Graph's Class Defaults, derived classes will be mar ...

Actor corruption due to Hierarchy broken after load

UE - World Creation - Worldbuilding Tools - World Partition - Apr 25, 2023

We recently hit a situation where some actors would suddenly teleport across the map when they were modified in the editor. We figured out that the AttachParent of some actors got reset on editor l ...