Crash when opening the static mesh editor

Tools - Jan 26, 2021

We have been unable to get an internal repro so far, however we have had quite a few reports from the community reporting this issue. One user also stated this happens when migrating a project over ...

Setting a parent and child static mesh scale to negative effects the rotation on child when Snapped To Floor

UE - Gameplay - Jul 21, 2016

Setting a parent and child static mesh scale to negative effects the rotation on child when Snapped To Floor Looks to be directly related to this JIRA: https://jira.ol.epicgames.net/browse/UE-3152 ...

Editor Crash after Compiling Primary DataAsset

UE - Gameplay - Blueprint Compiler - Feb 16, 2023

After compiling a data asset blueprint, attempting to open the parent data asset will crash the editor. From licensee: This is because in FAssetEditorToolkit::InitAssetEditor() the objects in Objec ...

Assert when having too many VR devices

UE - Platform - XR - Aug 31, 2018

Internal team is encountering a crash when adding too many VR devices. Email thread titled "Re: Crash Logs" The bug is an internal limit of devices the code supports, which is 8. If a controller o ...

Ensure when setting Bone Axis to None in Spline IK

UE - Anim - Rigging - Dec 13, 2016

An ensure occurs when setting Bone Axis to None on a Spline IK node. This doesn't occur with any of the other options for Bone Axis. ...

[CrashReport] UE4Editor_DetailCustomizations!FBodyInstanceCustomization::MarkAllBodiesDefaultCollision() [bodyinstancecustomization.cpp:829]

UE - Simulation - Physics - Aug 29, 2017

This is an infrequent crash occurring in the 4.17 release. Users have not provided any descriptions of their actions when the crash occurred. Source Context 816 void FBodyInstanceCustomiza ...

Clear Coat looks incorrect in the Preview when Energy Conservation on Material is enabled for non Substrate rendering

UE - Rendering Architecture - Materials - Apr 11, 2024

Enabling Energy Conservation on Material makes Clear Coat Material look weird in Preview. It looks fine in the Level Editor, but not in any "Preview" type viewport (Material Editor, Asset Thumbnails ...

Importing fbx onto an empty camera animation sequence can crash the editor

UE - Anim - Sequencer - Jan 27, 2022

Importing an FBX into an empty camera animation sequence crashes the editor. The import seems to fail when trying to add a camera cut track. Exporting an fbx from a camera animation sequence, deleti ...

Any Alpha value set in a FLinearColor used to draw a line on a Canvas HUD is ignored when the line is drawn

UE - Graphics Features - Apr 21, 2015

If an Alpha value is set in a FLinearColor that is used to draw a line on a Canvas HUD, the Alpha value is ignored when the line is drawn. A comment in BatchedElements.cpp indicates that some legac ...

Raytraced reflection doesn't work with high roughness

UE - Graphics Features - Lumen - Oct 30, 2020

Even when the max roughness for raytraced reflections is set to 1, they seem to be blended away at far below that value. For projects (e.g. film,vfx) where quality trumps speed it would be valuable ...