Lighting data wiped if sub level is hidden while rebuilding lighting for visible levels

UE - Graphics Features - Jan 11, 2017

When building lighting now you can no longer have a hidden sub level and have it retain it's built light if it was previously built. For instance, if you have a persistent level and hide the sub-lev ...

ConstructorHelpers::FObjectFinder failing to compile with UPaperFlipbook

UE - Foundation - Core - Feb 21, 2017

If ConstructorHelpers::FObjectFinder is used with UPaperFlipbook as its class specifier, compiling the code fails with the following error: Error C2664 'void ConstructorHelpers::ValidateObject(UObj ...

Split pins of Function inputs do not correctly update if variable type is changed

UE - Gameplay - Blueprint - Aug 30, 2017

When using the inputs of a function, splitting a variable and then changing its variable type does not properly update the node as expected. This occurs with any variable type that can be split. Sav ...

[CrashReport] Ran out of memory - FFixedUObjectArray::PreAllocate()

UE - Foundation - Core - UObject - Sep 7, 2017

This is a somewhat common crash affecting users in 4.17. Users have not provided any descriptions of their actions when the crash occurred. Source Context 165 if (GWarn) 166 { ...

DataTable CSV export; First member of Array not exported if set to default value

UE - Gameplay - Blueprint Editor - Mar 26, 2018

When using a struct as a type for TArray and first element of the array has first member variable of the struct set to default, it is not exported to *.csv ...

Fix world to meters scale

UE - Platform - XR - Apr 11, 2018

Is changing the world to meters in the current 4.19 AR template project supposed to affect the world, or is world to meters only for VR projects currently? We have project where a client wants us to ...

SceneCapture2D output broken when used in VR

UE - Platform - XR - Feb 25, 2019

Scene Capture regression when used with VR. Confirmed in Main @ CL 5172170 Tested with Rift Flipped VR Preview window is a known/fixed issue ...

Loading a map via File->Open Level... when it is already loaded in World Composition view does not reset actors to origin

UE - World Creation - Worldbuilding Tools - World Composition - May 14, 2019

Loading a map via File->Open Level or just by clicking on it to open it, when it is already loaded in World Composition view does not reset actors to origin. The actors instead keep the same positio ...

Construction script does not properly reset array count

UE - Gameplay - Oct 28, 2019

It appears that in UE 4.23, some specific arrays in construction scripts are no longer cleared automatically and retain references to TRASH objects from the previous construction script calls. This ...

Incorrect behavior when copy-paste repeatedly in the sequencer subscene track

UE - Anim - Sequencer - Mar 24, 2021

This issue is different for the first and second behaviors, which seems confusing when working. ...