Unreal Engine Issues

Convert selected components to Blueprint Class will crash if the Actor is not tagged as BlueprintSpawnableComponent

The editor will crash when using "Convert Selected Components to Blueprint Class" for actors that the root component is not tagged as a BlueprintSpawnableComponent. ...

Split Struct pins cause errors when a project is converted to 4.17

Split Struct pins cause errors when a project is converted to 4.17. You are still unable to split struct pins even if a new variable is created for the struct. Only adding a new variable to the st ...

PrecomputedAOMask cannot be used when Virtual Texture is enabled

The problem is that when the VirtualTexture lightmap is enabled, the value returned by the material node's PrecomputedAOMask is incorrect. ...

Nanite compute materials don't work with VolumetricLightmap

GAS: Double attributes not shown GameplayDebugger

Context The Gameplay Ability System lets devs specify numerical attribute properties in UAttributeSet subclasses. Although the preferred attribute property type is FGameplayAttributeData, GAS has l ...

Reparenting a UserWidget within that widget's events can break links between UWidgets and their SWidget.

Reparenting a widget within it's own event can cause that widget's tree to have null references instead of references to slate widgets. This happens because when a widget is reparented, we remove a ...

Crash in Forward Renderer DX11 RHI Impl when using VR PIE

// enforce color target is <= depth and MSAA settings match if(RTTDesc.Width > DTTDesc.Width || RTTDesc.Height > DTTDesc.Height || RTTDesc.SampleDesc.Count != DTTDesc.SampleDesc.Count || ...

GameplayAbilitiesSystem: GameplayCues OnRemoved never firing

This behaviour was introduced in the following changelists in 5.3: CLs 25371706 and 25407985 https://github.com/EpicGames/UnrealEngine/commit/6e985ceeb98bc0d166756ccd3e3c0b0350d02265https://github. ...

UBlueprintEditorLibrary::ReparentBlueprint() results in compiler errors when attempting to reparent from a native parent class to a blueprint parent class

When using the Reparent Blueprint node in an Editor Utility Blueprint, e.g. an Asset Action Utility, compilation errors will occur if you try to reparent a blueprint with a native parent class to a ...

Material Emissive Color not working with SkyAtmosphereIlluminance Material Expression

A licensee has reported that they are unable to use an emissive material utilizing the SkyAtmosphereLightIlluminance material expression together with Nanite and Lumen. The linked UDN has some more ...