Additive Animation does not work as intended when Ref Frame Index is more than zero

UE - Anim - Runtime - Dec 19, 2023

In some conditions, additive animation shows different/wrong behavior on Standalone Game and packaged game, from the other PIE. Watch the attached video. [Link Removed] The key points to reproduce ...

Adding "Add Velocity" module to event handler stage causes ensure (ensureMsg)

UE - Niagara - Scripting - Dec 19, 2023

Adding a module which has Required Dependencies (such as "Add Velocity") to event handler stage causes ensureMsg. > > In system /Game/NewNiagaraSystem.NewNiagaraSystem, module AddVelocity (NiagaraN ...

Cannot set background color for UI Domain material preview

UE - Editor - UI Systems - UMG - Dec 18, 2023

Animation attributes - user defined structs containing types defined in plugins cannot be registered

UE - Anim - Runtime - Dec 18, 2023

This issue is caused by us forcing user defined structs to be loaded as part of AttributeTypes::Initialize.  That is called after at the ObjectSystemReady run phase during engine initialization howe ...

Enhanced Input Action Triggers may be silently ignored when using multiple bindings in a context

UE - Gameplay - Input - Dec 15, 2023

The root cause appears to be an order of operations change made for [Link Removed] (CL 18309493 in UE5/Main). On EnhancedPlayerInput.cpp:238, the TriggerStateTracker is combined with state evaluated ...

GAS: FGameplayAbilitySpecHandle lacks invokable serialize function

UE - Gameplay - Gameplay Ability System - Dec 15, 2023

FGameplayAbilitySpecHandle is a struct that can be replicated by-design to identify a granted GameplayAbility in server-client communication. This works fine with default struct replication using FR ...

FColorSpaceTransform Crash on Linux due to misalignment

UE - Virtual Production - Rendering - Color - Dec 15, 2023

FLinearColor FColorSpaceTransform::Apply(const FLinearColor& Color) crashes while attempting to VectorLoadAligned() when running the UnrealEditor on Ubuntu 22.04. ...

Nanite custom depth rendering is missing support for r.CustomDepthTemporalAAJitter=0

UE - Graphics Features - Nanite - Dec 14, 2023

Nanite custom depth rendering doesn't "de-jitter" the view parameters for custom depth rendering when r.CustomDepthTemporalAAJitter is set to 0. This was discovered by a licensee and reported via U ...