Running traces consecutively sometimes register incorrect hits

UE - Gameplay - Apr 6, 2015

If two line traces are run one right after the other to the same end point but different start locations, at times the second trace will incorrectly register hitting other objects though the trace l ...

Shadow Acne Occurring on Movable Objects

UE - Graphics Features - Oct 27, 2016

Shadow Acne is occurring on movable actors in Blueprint and C++ template projects. The Shadow Acne is present in editor and while launched on to Windows and Mobile. This was found on separate graph ...

Calling LoadLevelInstance on a Client causes the Client to be kicked from the server

UE - Networking - Apr 6, 2017

A licensee has reported an issue where using LoadLevelInstance on a client causes the client to become disconnected from the server. This happens with both Hosted servers and Dedicated servers. Reg ...

Crash when loading iCloud/CloudKit SaveGame on iOS

UE - Platform - Mobile - Jun 5, 2019

"...it seems the crash occurs because it is trying to load an empty (0 byte) save file. Stepping through the code in Engine/Plugins/Online/IOS/OnlineSubsystemIOS/Source/Private/OnlineUserCloudInterf ...

Standalone network profiler UI is cut off and unuseable at default DPI scale

UE - Networking - Sep 4, 2020

The network profiler C# exectuable that shipped in 4.25 is not fully useable on either my development machine or my home machine, because part of the UI is cut off below the window no matter how I r ...

Contact Shadow artifacts with ray lengths despite length

UE - Graphics Features - Nov 17, 2016

Contact Shadows have more shadowing errors with lower to mid values than in 4.13 release when the feature was still considered experimental. Even low Contact Shadow Length value is causing issues. ...

Array duplication of UObjects causes simultaneous editing of properties

Tools - Feb 8, 2018

 The user for this UDN encountered this simultaneous editing bug occurring only when duplicating  array elements of a custom UObject class. ...

Get polygon data via GetPolysInBox that are outside the box

UE - AI - Navigation - Apr 6, 2020

GetPolysInBox should get only the polygons(FNavPoly) that are on the bounds of the box. However, there are cases where polygon data outside the bounds of the box is currently obtained. It gets polyg ...

LIVE: On MAC, Atmospheric Fog Preview Renders Incorrectly with Default Settings

UE - Platform - Apple - Nov 14, 2014

On a Mac, Following the tutorial located here: https://answers.unrealengine.com/questions/132223/macbook-pro-preview-rendering-issues.html When opening a new level, the atmospheric fog renders soli ...

setting Simulate Physics and Set Actor Location And Rotation in code causes crash on project load

UE - Gameplay - Feb 19, 2015

If an actor's Simulate Physics and ActorLocation/Rotation properties are set in code the editor will crash immediately upon launch / debug in VS. ...