PCLaunch.rc.res is not not re-created during the build with -useprecompiled

UE - Foundation - Cpp Tools - UnrealBuildTool - Apr 15, 2016

A linker error is thrown when trying to build a project with -precompile / -useprecompile flags. Linker Error thrown: LINK : fatal error LNK1181: cannot open input file 'D:\UE4\Engine\Intermediate ...

Lengthy Compile Times on Blueprints Containing an Array of Self References When Multiple Instances Exist in the Level

UE - Gameplay - Blueprint - Oct 11, 2016

There are lengthy compile times with a blueprint with 50+ instances in the level that contains an array of self references. On lower-end machines, the compile times are upwards of 10 seconds. Found ...

High Quality Gaussian DoF not working on iOS Metal

UE - Platform - Mobile - Sep 2, 2016

The High Quality Gaussian DoF does not work when deployed to an iOS device that supports Metal. After enabling the setting within Project Settings to support Metal (A8 chipsets) and above, and then ...

Shadow casting still considered for performance when light intensity set to 0.0

UE - Graphics Features - Sep 8, 2016

Shadow casting is still considered when the lighting intensity has been set to 0. This is a regression in performance from 4.12.5 where a lights intensity that was set to 0 would not be considered ...

Animation Preview not playing under certain conditions

OLD - Anim - Aug 13, 2015

Pausing the animation preview while in the Graph Tab of an Animation Blueprint will result in all animation previews being paused when you navigate to the Animation Tab. ...

r.PostProcessAAQuality does not work in mobile preview on source builds

UE - Platform - Mobile - Sep 26, 2016

r.PostProcessAAQuality is not working properly in mobile preview on source versions of the engine. ...

Steam VOIP will drop packets with more than two people talking at once

UE - Online - Oct 5, 2016

VOIP has a limited amount of concurrent clients talking before packets start to get dropped. ...

Setting FActorSpawnParameters::bRemoteOwned causes inconsistent behavior when spawning actors

UE - Gameplay - Sep 13, 2016

If FActorSpawnParameters::bRemoteOwned is set to true, calling SpawnActor with this spawn param on begin play has different behavior than calling the SpawnActor elsewhere during runtime. If using n ...

Child actor components get duplicated when duplicating a level (extra duplicates)

UE - Gameplay - Sep 7, 2016

Child actor components get duplicated when duplicating a level (extra duplicates). The duplicate level has more instances of the child actor component than the original ...

Using the "Clear Options" node on the event OnSelectionChanged for a combo box (string) will fail to remove the text from the selected item

UE - Editor - UI Systems - Sep 15, 2016

Using the "Clear Options" node on the event OnSelectionChanged for a combo box (string) will fail to remove the text from the selected item. The options are removed but the the text of the last sele ...