Crash Occurs When Opening a Second Sequence After Altering the First While Simulating in Editor

UE - Anim - Sequencer - Jan 30, 2018

-When opening a second sequence after altering the one prior(locking and unlocking the camera) while simulating in the editor, leads to a crash -Did not occur in 4.19 Preview 1 -As for the link to ...

When OpenGL ES 3.1 is enabled for Android build in Handheld AR Template, camera inverts colors

UE - Platform - XR - Mar 26, 2018

When OpenGL ES 3.1 is enabled in Android Build settings, device prompts user to choose to "Allow ARInvertColor to take pictures and record video". If allowed, colors are inverted by the camera. If ...

Unable to compile Runtime plugins

UE - Foundation - Cpp Tools - Plugin System - Jun 27, 2018

Attempting to package a runtime plugin in 4.20 results in the following error: ERROR: System.IO.DirectoryNotFoundException: Could not find a part of the path 'D:\Unreal Projects\4.20\PluginTest\Test ...

Duplicated Editor-Runtime actors won't tick

UE - Gameplay - Aug 29, 2018

When duplicating an Actor at Runtime, the duplicated Actor won't execute any tick events when duplicated from the World Outliner or Alt-clicked and dragged in the Viewport. If the Actor is dragged i ...

Data table editor uses property names as column headings

Tools - Nov 2, 2018

The column names in the data table editor appear to directly use the property name instead of the "pretty" version of the property name. If the "DisplayName" meta specifier is used, though, that is ...

Scaling with Vive Controllers in VR Mode with Blueprint Editor Open Causes Windows to Jitter Violently

UE - Editor - Workflow Systems - Jun 18, 2018

On Mac in VR Mode, when scaling the world with the controllers while the Blueprint Editor open, all open windows begin jitterring violently. This only occurs if the Blueprint Editor is one of the op ...

Replay playback can become paused indefinitely after scrubbing with high time dilation

UE - Networking - Feb 19, 2020

When playing a replay with DemoPlayTImeDilation set to 5, and jumping around the timeline using GotoTimeInSeconds(), the play back can break, with game actors freezing and violently shaking. It seem ...

Lightmass ignores StaticSwitch in materialinstance

UE - Graphics Features - Aug 12, 2020

This is caused by FLightmassMaterialProxy doesn't have GetStaticParameterSet() function. (FMaterial::GetStaticParameterSet() is called.) It can be fixed by adding the following function to FLightma ...

UDIM UVs are wrong

UE - Graphics Features - Feb 19, 2020

UE4 applies 1-x transform to V coordinate when importing UVs from mesh. This is to handle GL/D3D differences in texture origin, but it breaks UDIM page addressing. It's possible to apply a fix to ...

SessionFrontend Causes Lost Audio on iOS After Switching Apps

UE - Audio - Oct 20, 2020

When using SessionFrontend on some devices, when leaving the app (going to the home screen or another app) or sometimes locking the device there is no more audio after returning to the game. "It lo ...