Lack of multi-bounce when using software traced lumen radiosity

UE - Graphics Features - Lumen - Apr 4, 2025

Certain Lumen Hardware Ray Tracing CVars, when disabled in isolation, will not fall back to tracing the Global Distance Field, because the Global Distance Field is still disabled. The function "Lum ...

Setting linear dampening during runtime via the event graph does not work for separated chunks

UE - Simulation - Physics - Destruction - Dec 18, 2014

DESCRIPTION: When using a DM in blueprints and setting the linear dampening in the event graph the DM will honor the linear dampening but the chunks as they break off will not. Setting the mesh to ...

[MetaSounds] - Sound Waves used in composition cut out after GC in packaged game if the reference graph uses a literal input

UE - Audio - MetaSounds - Mar 18, 2022

When a Sound Wave is set on a referenced node, and that node is used in composition, the Sound Wave will cut out after some time. This does not occur if the reference node uses an Input node for the ...

Cannot set the Rotation value of an Instance Static Mesh component if the scale is set to zero

UE - Gameplay - Feb 3, 2015

Cannot set the Rotation value of an Instance Static Mesh component if the scale is set to zero. This can be done with StaticMesh components and standard Static Meshes in the level. ...

EnhancedInput Chorded Actions do not work on higher priority mappings

UE - Gameplay - Input - Aug 21, 2023

Reported from Prismatic: It appears that the Add Mapping Context function currently prioritizes low numbers over high numbers, which seems inconsistent with the function description and some parts ...

Actor components in blueprintable structs are uneditable in full BP editor, but not on instanced actors or in data BP editor

UE - Gameplay - Blueprint Editor - Jan 24, 2024

When an actor has a blueprintable struct that contains a reference to an actor component and that component is created default in the actor's constructor, the struct and the component will be unedit ...

Gameplay Tag Query on Actor Component cannot be editted normally on instances

UE - Gameplay - Gameplay Ability System - May 23, 2024

A GameplayTagQuery in an ActorComponent cannot be properly edited on instances of an actor with said component. There is a workaround, but the issue makes editing Tag Queries rather annoying, doubl ...

Reflection Captures permanently unload with world streaming

UE - Graphics Features - Jul 19, 2024

When a reflection capture is unloaded due to streaming, it cannot be reloaded when the player returns to that area in the world because FReflectionCaptureData::OnDataUploadedToGPUFinal deletes the C ...

UGeometryCollectionComponent::EventDispatcher gets registered for events twice what can result in duplicate collision events being fired

UE - Simulation - Physics - Destruction - Sep 18, 2024

UGeometryCollectionComponent::EventDispatcher gets registered for events twice, once in UGeometryCollectionComponent::RegisterForEvents() and again in UChaosGameplayEventDispatcher::OnRegister(). Th ...

Creating TArray of components does not allow component elements to be edited in blueprints

UE - Gameplay - Blueprint - Mar 8, 2016

When an array is used to declare actor components, the component elements that make up the array cannot be edited inside blueprints. ...