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 ...

Actors not marked as Always Relevant do not replicate to Clients that have possessed a vehicle past 15,000 units of the point of possession

UE - Networking - Oct 20, 2015

Actors not marked as Always Relevant do not replicate to Clients that have possessed a vehicle past 15,000 units (the sq root of Net Cull Distance Squared) of the point of possession. Note that repl ...

Cannot package a Client version of a project in UFE when using VS 2017

Media Framework - May 16, 2018

Trying to package a Client version of a project using Visual Studio 2017 currently fails. Packaging a Client version of a project using Visual Studio 2015 completes successfully. Alternate Steps to ...

Start Up Movies Are not Playing for iOS Devices when using Launch-On

UE - Platform - Mobile - Dec 9, 2016

When designating 3 Intro/Start Up movies to play back to back in the Project Settings of a mobile project, the user reports that they will play as expected for Android devices, but only one movie wi ...

CLion cannot open a new code project after the Editor has been set to use CLion

UE - Foundation - Core - Feb 2, 2018

CLion fails to successfully open a new code project created with an Editor that has been set to use CLion as the preferred source code accessor. ...

Reflections Not Behaving As Expected in Splitscreen

UE - Graphics Features - May 15, 2018

In splitscreen, Player 0 view influences reflections for other player views. A user submitted the included test project showing the issue, and I have reproduced on 4.18.3 as well as 4.19.2 (see Spli ...

Function output nodes containing an array will cause packaging to fail when nativizing blueprints

UE - Gameplay - Blueprint - Aug 14, 2017

If a blueprint contains a function with an array output and the project is being nativized, the package will fail with an error similar to "error C2679: binary '=': no operator found which takes a r ...

Crash On Startup If a Cubemap Texture For a Skylight Is Set In The Constructor

UE - Graphics Features - Jul 23, 2018

Crash on startup If a cubemap texture for a skylight is set in the constructor.  Attached images of where the user thinks the crash is coming from. Works Properly in 4.19 CL# 4033788 Found in 4.20 ...

Mobile Occlusion (ES3.1) is buggy with multiview enabled on Mobile VR platforms

UE - Platform - Mobile - Jul 31, 2018

Launching on VR Mobile platform with Mobile Multiview and OpenGL ES3.1 enabled breaks occlusion. Also occuring in Main @ CL4235929 Users example project attached, also confirmed in VR Template. ...

When a client sends an Unreliable RPC to the Server in same frame with a Reliable RPC, Unreliable RPCs are Reliable

UE - Networking - Sep 25, 2018

When a client sends an Unreliable RPC to the Server in same frame with a Reliable RPC, Unreliable RPCs are Reliable. It implies extremely high lag on each lost RPC and all following ones. User lose ...