User created OSS plugins require modifying Engine now

UE - Online - Aug 24, 2018

This was discovered in live build and posted in UE Forums that based on changes to OSS, users (binary specifically) can no longer create their own OSS plugins as it requires modifying the Engine Sou ...

Characters using NavWalking on server have noticeable jitter on clients at lower framerates

UE - AI - Aug 23, 2018

AI nav walking doesn't allow clients to set a "Base" for the character (SetBase from UpdateFloorFromAdjustment), so there is no floor result on frames where there is a net update. This causes simula ...

Keep World option for Attach / Detach to / from Component does not replicate properly to clients

UE - Networking - Aug 23, 2018

Using Attach To Component and Detach From Component with the Keep World option for the Location/Rotation/Scale rules does not replicate properly to clients. This does work when using AttachToActor a ...

Preview Mesh for Skeleton/Animation can't be saved correctly

OLD - Anim - Aug 23, 2018

It seems that preview meshes of Skeleton/Animation can't be saved correctly. I had changed a preview mesh and had saved it, but after reopening the project, the setting was ignored and the preview ...

Niagara GPU Mesh Particles Not Working In Packaged Project

UE - Niagara - Aug 22, 2018

GPU Mesh emitters will not show up in a packaged project. Found in 4.20 CL# 4302132 and 4.21 CL# 4307852 ...

Tooltips are not displayed for inherited variables

UE - Gameplay - Blueprint - Aug 22, 2018

When creating a child Blueprint class and displaying the inherited variables from the parent, any tooltip text created does not show. ...

[CrashReport] UE4Editor_RenderCore!FPendingCleanupObjects::~FPendingCleanupObjects

UE - Graphics Features - Aug 21, 2018

Comments from users in crash group:I tried to launch my project  1266 FPendingCleanupObjects::~FPendingCleanupObjects() 1267 { 1268 QUICK_SCOPE_CYCLE_COUNTER(STAT_FPendingClea ...

PreviosFrameSwitch Material Expression Does Not Work With Displacement.

UE - Graphics Features - Aug 21, 2018

The PreviousFrameSwitch material expression works as expected only with world position offset, but not tessellated displacement. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, 4.21 CL# 4302610 ...

Struct Boolean value can be changed when using a Set node for the struct in Blueprints

UE - Gameplay - Blueprint - Aug 21, 2018

If a struct has a property with the EditCondition meta after a Boolean property that is set to the Boolean property, this Boolean property will be changed inadvertently when a Set node is used for ...

Control Rotation set in AGameModeBase may be inconsistent between Servers and Clients (or between Standalone and Multiplayer)

UE - Gameplay - Aug 21, 2018

AGameModeBase::FinishRestartPlayer and AGameModeBase::RestartPlayerAtPlayerStart handle rotation differently for Spawning Pawns and Control Rotation depending on whether or not the game is Standal ...