Lumen with HWRT has an artifact on AMD GPU

UE - Graphics Features - Lumen - Feb 6, 2024

Repro test required.We don't have AMD GPU to create the same environment here, so we collected reproduction information from the licensee and passed it on as is.Let me know if you need any additiona ...

Crash in WorldPartition when creating cyclic references in LevelInstances

UE - World Creation - Worldbuilding Tools - Level Instances - Feb 1, 2024

Gameplay Ability Component Montage Replication incorrectly handles cyclic animation sections

UE - Gameplay - Gameplay Ability System - Dec 4, 2023

In AbilitySystemComponent_Abilities.cpp, the check for the client being on a different section on line 3059 checks that the RepNextSectionID is not the current section. One would assume this is beca ...

"Favorite Levels" not persisting correctly when changed in the Editor

UE - Editor - Workflow Systems - Nov 21, 2023

In the Level Editor's "File" menu, there is a "Favorite Levels" list, which is persisted in the config file "EditorPerProjectUserSettings.ini" under section "[FavoriteFiles]". Manually editing this ...

Landscape nanite height mismatch

UE - Graphics Tools - Terrain - Landscape - Oct 17, 2023

From licensee: The height of Nanite rendered landscape does not match the height of non-nanite landscape. The error gets worse if you increase the Z Scale of the landscape actor. Our project rec ...

Shadowmapping broken in Android Vulkan Editor Preview

UE - Platform - Mobile - Oct 2, 2023

Unable to set a BP component field with WithIdenticalViaEquality

UE - Gameplay - Components - Sep 29, 2023

There's some quirky behavior occurring with the component's CDO when we change a value that isn't compared by the native code's equality operator. It only seems to commit when we first change anothe ...

Camera set to Projection Mode Orthographic doesn't appear to be rendering Sky Atmosphere

UE - Rendering Architecture - Sep 13, 2023

This is a regression. Tested in //UE5/Release-5.2 CL26001984 It appears Sky Atmosphere isn't rendered by a camera with projection mode set to Orthographic. ...

Enhanced Input Axis Actions repeatedly firing the last input value when entering a Common UI menu

UE - Gameplay - Input - Sep 7, 2023

When using an axis mapped input action such as looking around with a gamepad joystick, then opening a Common UI menu, the last input axis value will keep firing irrespective of the current joystick ...

FAnimUpdateRateParameters::GetInterpolationAlpha appears to be returning an invalid value for TrailMode

UE - Anim - Aug 5, 2023

It appears that  FAnimUpdateRateParameters::GetInterpolationAlpha is not returning a sensible value when running in TrailMode.  Currently the only variable in the calculation is EvaluationRate which ...