LOD Picker does not update to reflect the correct Number of LODs in the Skeletal Mesh Editor

UE - Editor - Content Pipeline - Import and Export - Sep 27, 2019

There seems to be an issue with the LOD Picker not updating after The LOD does not update to the default LOD0 or Auto LOD after Number of LODs changes, creating an invalid range for the currently se ...

Empty Mesh Sections with MergeActors Tool

UE - World Creation - Worldbuilding Tools - HLOD - Sep 27, 2019

Map Check will output the following error, which makes no sense: SM_FourCubes_1 - 1 element(s) with zero triangles in static mesh 'SM_FourCubes' ...

Doesn't update sound Attenuation if used sound Attenuation node at anim sequence editor.

UE - Audio - Sep 27, 2019

There is a problem with the sound update when using "Sound Attenuation" in the Animation Editor. In the Animation Editor, if the mouse cursor is located in a viewport and you change the position of ...

Stereo layers with depth render translucency as black on Oculus Quest

UE - Platform - XR - Sep 27, 2019

[Link Removed] ...

Race condition in full builds of UE4 engine source

UE - Foundation - Cpp Tools - UnrealBuildTool - Sep 26, 2019

This is a race condition caused by how "Clean.bat", a batch file used during rebuilds, tries to manually rebuild the UnrealBuildTool project when it runs. This causes a spam of UnrealBuildTool build ...

HDRI Backdrop Actor not working on mobile

UE - Platform - Mobile - Sep 26, 2019

The new HDRI Backdrop actor does not appear to be functioning on mobile. ...

Investigate deprecating byte-swap during save

UE - Foundation - Core - Sep 26, 2019

All major UE target platforms are little-endian. Saving packages with byte-swapping seems to have been broken for more than six years, when CL# 1495479 changed `FArchive::ByteOrderSerialize()` so th ...

EQS Debug Draw Shows Old Query Information

UE - AI - Sep 26, 2019

Sample project: [Link Removed] Debug draw update correctly: [Link Removed] Debug draw update incorrect: [Link Removed] ...

VR Mode - Landscape Mode - Flatten tool crash

UE - LD & Modeling - Terrain - Landscape - Sep 25, 2019

Crash will occur when attempting to use Flatten tool on landscape while in VR Editor. Confirmed in 4.24 MAIN @ CL 9084132 Confirmed on Vive and Rift ...

ClearMotionVector does not clear cloth motion blur velocity

UE - Graphics Features - Sep 24, 2019

ClearMotionVector does not clear cloth velocity that causes temporal AA or motion blur. ...