FQuat::NetSerialize modifies the original value which can cause it to be replicated continuously

UE - Networking - Jun 8, 2018

FQuat::NetSerialize will always call Normalize() as part of replicating the current value, so that only the X, Y, and Z components need to be serialized (the W can be computed on load). This operat ...

The order of Actors assigned to a Physics Constraint affects the simulation

UE - Simulation - Physics - Jun 8, 2018

The order in which actors are listed on a physics constraint affects the physics simulation. This should not make any difference in how the physics are simulated. Regression?: No This occurred in ...

Volumetric Fog causing light to get darker after each lighting build

UE - Graphics Features - Jun 8, 2018

With dense volumetric fog enabled it will cause the lighting to get darker each build you do. ...

Warnings Log spam when pasting a widget into any panel widget

UE - Editor - UI Systems - Jun 8, 2018

An increasing amount of warning show up in the output log as a widget is pasted into a name space that is part of a widget that has been added to another widget via the user created section. Examp ...

Crash when exiting PIE after execute demorec command

UE - Networking - Jun 8, 2018

This issue is regression because it doesn't reproduce 4.18.3. Default level is just the level to move. Demorec level runs demorec command with beginplay and has one replicated variable. UEditorEn ...

Welded grandchildren do not overlap properly when their grandparent is simulating physics

UE - Simulation - Physics - Jun 7, 2018

Grandchildren (C in an attachment hierarchy of A < B < C) that are auto welded have issues related to overlap events when moving via physics. They tend to overlap later than they should. This does n ...

Unlit view is affected by Exposure Compensation when enabled by post process volume

UE - Graphics Features - Jun 7, 2018

Unlit view is affected by Exposure Compensation when enabled by post process volume. This will also carry across the other debug views.  Working as expected in 4.18 CL# 3832480 Found in  4.19 CL# ...

4.20p1 Niagara System & Emitter windows missing compile icon with small toolbar icons

UE - Niagara - Jun 7, 2018

in the Niagara System & Emitter windows the compile button will be missing if small toolbar icons is enabled. The icons work correctly if this is not enabled. Found in 4.19 CL# 4033788, 4.20p1 CL# ...

Changing LODBias on landscape sections causes grass type placement issues

UE - LD & Modeling - Terrain - Landscape - Jun 6, 2018

Changing LODBias on landscape sections causes a grass type placement issues. The grass will be floating and rotated incorrectly. Found in 4.18 CL# 3832480,  4.19 CL# 4033788, 4.20 Preview 1 CL# 4 ...

Levels Panel "Move To" function does not move level to desired location

Tools - Jun 6, 2018

Levels Panel "Move To" function will not move level to the desired location. The menu will stay open and do nothing when you try to move it.  Found in 4.18 CL# 3832480,  4.19 CL# 4033788, 4.20 Prev ...