Windowed Fullscreen causes Lighting Variations in Rendered Envrionment

UE - Graphics Features - Jan 18, 2016

When a scene is light with a single Stationary Directional Light and a Single Stationary Skylight and packaged to use Windowed Fullscreen, there is a difference in how the scene is rendered compared ...

Crash during PIE using the Spawn Actor node on EventBegin Play on Mac

UE - Platform - Apple - Feb 23, 2016

A user has reported a crash when attempting to use the 'Spawn Actor' node within his level blueprint. I was able to follow the repro steps provided in the original answerhub post and get the crash ...

STARTMOVIECAPTURE no longer works in a single player game

UE - Anim - Sequencer - Jan 27, 2017

STARTMOVIECAPTURE no longer works in a single player game [Link Removed] looked into the code and found that it's in the EditorServer code. We tried it with two players and then it appears to work ...

Project Crashes on UAIPerceptionComponent::RegisterStimulus()

UE - AI - Apr 26, 2016

Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 785] Array index out of bounds: 2 from an array of size 2 Source Context: 363 return OwnerController->GetPawn(); ...

Sound Track in Matinee Ignoring Track Location and Playing Audio at Beginning of Sound Wave/Cue

Tools - Sep 22, 2015

When scrubbing the Matinee handle with a Sound Track added, no matter the location of the handle, the sound wave associated will play from the beginning of the audio file. Tested in 4.8.3 - 2634408 ...

SceneCapture2D Components when referenced on screen by UI widget will cause massive screen flickering in Standalone, Launched or Packaged Game

UE - Graphics Features - Feb 10, 2016

When a SceneCapture2D actor is added as a Component to a Blueprint actor and the Render Target is assigned to a UI component in the level, the screen flickers at a rapid pace. The effect is slightl ...

Run Command fails when launching code project onto Mac from the editor

UE - Platform - Apple - Apr 18, 2017

This only affect Launching on code projects. Packaging code projects works fine.LogPlayLevel: Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException: Unabl ...

Regression: "Play particle effect" anim notifies are not seen in the editor playing level sequence/matinee when Attached is set to false

UE - Graphics Features - Dec 21, 2017

Not Attached particle system is not seen in the viewport of the editor. This particle will be seen normally when PIE.  Regression? Yes. This issue is not reproduced in 4.17 version. You can simply ...

Crash while closing Create Blank New Blueprint window after attempting to name blueprint the same name as another blueprint

UE - Gameplay - Blueprint - Jul 27, 2016

Crash while closing Create Blank New Blueprint window after attempting to name blueprint the same name as another blueprint. This crash only occurs when attempting to close the window using the "X" ...

Unexpected behavior from moving multiple widget components with render transform

UE - Editor - UI Systems - May 10, 2017

Unexpected behavior occurs from moving multiple widget components with render transform applied to them. The individual components seem to change relative position or rotation when being clicked and ...