Niagara GPU Emitter Flickering at Certain Angles When the System Origin is Occluded

Rendering - Niagara - Mar 25, 2019

Niagara GPU Particle Flickering at Certain Angles When the System Origin is Occluded. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 Preview 6 CL# 5439949, and 4.23 CL# 5533539 ...

Light baking of a ton of static meshes causes Swarm to crash.

DevTools - Mar 25, 2019

Light baking of a ton of static meshes causes Swarm to crash due to "Index was our of range". I confirmed that it can be reproduced with the sample project they sent us/ The error log I got is... ...

Second player's screen does not render in Split Screen on Android

Platform - Mobile - Mar 21, 2019

The second player's screen in a Split Screen multiplayer session on Android does not render. It remains completely black. This was also an issue prior to 4.15 but was fixed with UE-35204. The fix ap ...

Editor will freeze if anim composite has an animation with a notify and length of 0

Anim - Animation - Mar 21, 2019

An anim composite will freeze the editor if one of its animation segments has a a notify and a length of 0 or less. Debugging shows that the engine is stuck inside UAnimSequenceBase::GetAnimNotifies ...

Niagara System Doesn't Update Mesh Renderer If Static Mesh is Changed in the Emitter

Rendering - Niagara - Mar 20, 2019

The Niagara System doesn't update the mesh renderer If the Static Mesh is changed to an Imported Mesh in the source emitter Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL#  5470758 ...

ProxyGenerationData is not handling error correctly

Tools - Mar 19, 2019

The bug can create a deadlock ...

Levels lose folder hierarchy in Levels window on streaming method change

Tools - Mar 19, 2019

In the Level Window, Sub Levels which are nested inside of a folder will lose their hierarchy upon changing their streaming methods. ...

Crash on loading pre-4.20 cloth data when compute skin cache is enabled in 4.21

Rendering - Mar 19, 2019

According to information from the licensee, the else clause was added to "FSkeletalMeshLODModel::(GetClothMappingData()" at CL 4437969 , but if it is the cloth data existing from 4.20 or earlier, it ...

Mouse Events cannot be treated as Touch on Android Apps on Chromebook

Platform - Mobile - Mar 18, 2019

A licensee reported an issue where mouse events are not able to be used as touch events on Android apps. This was specifically reported on and tested on Chromebooks. After working with Chris Babcock ...

Net Dormancy does not apply to initial replication for clients

Networking - Mar 15, 2019

A user has reported that Net Dormancy is currently giving inconsistent and unexpected results. Their original report was that Net Dormancy was preventing replicated actors from disappearing when the ...