Material Opacity Mask Not Working As Expected in PIE but Does in Standalone

UE - Graphics Features - Feb 5, 2019

Material Mask Opacity is not working in PIE, but works as expected in Standalone.  Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4862710, and 4.23 CL# 4898645 ...

Reimport skeletalmesh do not keep the AssetUserData

UE - Editor - Content Pipeline - Import and Export - Feb 19, 2019

ProxyGenerationData is not handling error correctly

Tools - Mar 19, 2019

The bug can create a deadlock ...

Landscape: When updating Physic Material on a landscape layer info object, the physic material is not propagated correctly

UE - LD & Modeling - Terrain - Landscape - Apr 4, 2019

This will result in not getting the Phys Material when doing collision query. Info from the UDN "Having stepped through the ULandscapeLayerInfoObject::PostEditChangeProperty I can see that the U ...

UE4Editor modules file is not written to properly when packaging a plugin

UE - Foundation - Cpp Tools - Plugin System - Apr 8, 2019

The modules file that is generated when packaging a plugin appends a number to the end of the .dll reference, similar to hot reload modules. This causes the reference to refer to a nonexistent file. ...

Assertion Failure: Cascade Particle !bPostTickComponentUpdate in same tick group as Cascade Particle system submission.

UE - Niagara - Apr 18, 2019

Attached Project:  [Link Removed] Since Upgrading project to 4.22, Licensee has been experiencing an Assertion crash in their built game. "I'm not exactly sure why it crashes. It's a very specific ...

FSoftObjectPath properties marked as both Config and Untracked are being tracked

UE - Foundation - Core - Apr 25, 2019

A licensee has found that marking an FSoftObjectPath property as Config and Untracked causes the untracking metadata to be ignored. This is because FSoftObjectPathThreadContext::GetSerializationOpt ...

Apple VoiceOver not compatible with UE

UE - Platform - Mobile - May 13, 2019

Support RHI texture readback for non 2D textures

UE - Rendering Architecture - RHI - May 22, 2019