Huge performance hit when recording a demo (demorec)

UE - Networking - Jun 3, 2019

The current engine version (4.22) seems to suffer a huge performance hit when using the demo recording (demorec) feature. This issue is present in both the editor and the packaged game (developer bu ...

4.24 Instanced Stereo Distortion Error in ComputeBufferUVDistortion

UE - Graphics Features - Nov 13, 2019

4.24 moves distortion calculations to the file DistortionCommon.ush and its`ComputeBufferUVDistortion` function. The code in the INSTANCED_STEREO define no longer works as `Interpolants` isn't passe ...

Editor Content remains visible in 4.25 preview when set to hidden

Tools - Apr 22, 2020

Editor Content remains visible when selecting a Static Mesh for a Cube Actor in 4.25 preview even after setting Engine content to hidden.  ...

[Dynamics Processor][Audio Bus Sidechain] - Audio Bus Sidechain doesn't function the second time a sound is triggered

UE - Audio - Audio Bus - Sep 2, 2021

Retriggering a sound using an Audio Bus as a sidechain on a Dynamics processor seems to not uses the sidechain. The sidechain will start working again if it's reset on the Dynamics Processor effect ...

[Soundfield Submix] - Editor crashes when PIE using a Soundfield Submix

UE - Audio - Submixes - Nov 16, 2022

Editor crashes when using a Soundfield Submix with any encoding setting (Unreal, Oculus, Resonance). Assertion failed: IsSoundfieldSubmix() && SoundfieldStreams.Settings.IsValid() [File:D:\build\++U ...

Lumen doesn't use correct sky light settings when GI scalability changes from Low to High

UE - Graphics Features - Lumen - Sep 24, 2024

When the Global Illumination scalability settings are changed in the editor from High to Medium, they primarily act on the r.Lumen.DiffuseIndirect.Allow and r.SkyLight.RealTimeReflectionCapture.  No ...

Skeletal mesh defined in code cannot be set in the editor.

UE - Gameplay - Blueprint - Apr 16, 2015

Defining a skeletal mesh component in code and attaching it to the root component will not allow the component's details to be editable inside the editor. ...

Editor Crashes when compiling a 3d widget after adding array variable

UE - Editor - UI Systems - Feb 23, 2015

Editor crashes when user adds array variable (any type) to a 3d widget that is used within a blueprint actor and then compiles the widget. Frequency: 4/4 Crash Reporter: [Link Removed] ...

Notifies are retriggered on loop of an animation in Matinee/Sequencer

UE - Anim - Sequencer - May 31, 2016

Notifies are retriggered on loop of an animation in Matinee/Sequencer. This occurs during Sequencer Editor playback and when playing in game. ...