Horde server fails to build Docker image

UE - UCS - Horde - Apr 1, 2025

If you attempt to build the Horde server Docker image right now it fails unless you have some of the layers cached or a nuget proxy/cache that has cached some packages. JetBrains have renamed their ...

Scaling a SceneCapture2D from Default Scale will cause Decals to Disappear in the Render Target

UE - Graphics Features - Dec 6, 2016

When scaling a SceneCapture2D actor/component any decals there were being rendered within the Render Target disappear. I also noticed that when the SceneCapture2d is set to orthographic, the scale ...

Invalid API documentation file

Docs - Jun 9, 2017

The API.chm file is invalid. Additionally the website API docs are out of date. This is tied to a larger issue with the APIDocTool. ...

ARCore - "Get Supported AR Video Formats" returns empty on Android

UE - Platform - XR - Dec 18, 2019

Get Supported AR Video Formats node only functions on iOS. (ARCore Library has similar 'Get ARCore Camera Config' node currently) Tested with iPad A1701 and Note 9 ...

Inifinite loop in tick task manager with tick when paused and interval

UE - Gameplay - Sep 16, 2016

When processing tick when paused tick interval tick functions an infinite loop can occur. ...

ParticlePosition doesn't use Previous values

UE - Rendering - Architecture - Niagara - Jan 9, 2024

FHLSLMaterialTranslator::ParticlePosition does not return Previous information when request which can result in bad motion vector calculation. ...

Motion blur artifacting in MetaHuman Crowd demo

UE - Rendering - Features - Sep 10, 2026

This issue was reported by a licensee and we also hit it during dev work on the crowds demo. It seems that this may be a general issue with motion vectors and teleporting actors as there are variou ...

Timer does not update in Vehicle Game

Docs - Samples - Oct 5, 2016

When trying to test Vehicle game, the counter did not increase as time elapsed. This prevents being able to test if the lap function is working. Tested in 4.13.2 CL 3145013 and it was working. Thi ...

Utility functions in UEdGraph_ReferenceViewer are no longer exposed

UE - Editor - Content Pipeline - Content Browser - Oct 29, 2018

A number of utility functions are provided in UEdGraph_ReferenceViewer for building menu extenders. This class was originally included in the engine as part of the ReferenceViewer module, but was re ...

Reimport Skeletal Mesh break Morph Targets if you have Active Reduction on base LOD

UE - Editor - Content Pipeline - Import and Export - Aug 27, 2019