Getting Emitter.NumParticles on Niagara's GPU compute sim returns 0

UE - Niagara - Jul 27, 2023

This problem looks like the following parameters are not defined correctly. The correct parameter is Engine_Emitter_NumParticles. Engine_Emitter_NumParticles and PREV_Engine_Emitter_NumParticles .\ ...

BP property initialization fast path does not handle non-instanced properties assigned to default subobjects correctly

UE - Gameplay - Blueprint - Jul 27, 2023

Non-instanced object ref properties are incorrectly being skipped at property initialization time when Blueprint class instances are spawned with the fast property initialization path enabled. This ...

Per Instance Random node not working in material layer

UE - Rendering Architecture - Materials - Jul 27, 2023

Licensees report that the definition of the USES_PER_INSTANCE_RANDOM macro only considers it in the context of the base material.  As a result Per Instance Random used only in material layers does n ...

NiagaraComponent attached to the character won't stay active when travelling to a new level using seamless travel

UE - Niagara - Jul 27, 2023

The pawn character is added to APlayerController::GetSeamlessTravelActorList, so it'll be persisted during server travel. The Niagara component is spawned during BeginPlay and activated manually. W ...

Setup command not downloading GitDependencies on arm64 Mac

UE - Platform - Apple - Jul 26, 2023

When running setup command on an M1 arm64 mac the dependencies fail to download. This issue is occurring in Github //UE5/Release-5.3 @ CL 26560699 This issue is NOT occurring in Github //UE5/Rele ...

WorldPartitionRenameDuplicateBuilder rename breaks soft object refs

UE - World Creation - Worldbuilding Tools - World Partition - Jul 26, 2023

Renaming map using builder will break soft obj refs and warnings will also appear in the log: Warning: Serialized Class /Script/Engine.World for a property of Class /Script/Engine.Actor. Reference ...

UFE: Can't delete custom launch profiles

UE - Editor - UI Systems - Jul 26, 2023

The confirmation message will fails spawning with the following messages in the log:  [2023.07.25-20.04.01:038][  0]LogWindows: Error: Failed to create dialog. The specified resource type cannot be ...

Preview rendering does not update when slider is moved below 0.0 in timeline on in Niagara Editor.

UE - Niagara - Jul 26, 2023

Workaround in UE5.3:  UNiagaraComponent::TickComponent             if (AgeDiff < 0.0f)             {                 SystemInstanceController->Reset(FNiagaraSystemInstance::EResetMode::ResetAl ...

Result pin of Cast Node of ControlRig can not break

UE - Anim - Rigging - Control Rig - Jul 26, 2023

In UE5.1, the Result pin of the ControlRig cast node could be broken, but it cannot be broken from UE5.2. ...

[AI] ZoneShapes visualization does not reset after selecting another actor

UE - AI - Jul 26, 2023

ZoneShapes do not reset visuals when being de-selected and re-selected. The last piece of the zone shape to be selected will still show as selected when the shape is re-selected, but using the edito ...