Unreal Engine Issues
Unreal Engine Issues
Editor Crashes when importing some FBXs with multiple Material IDs in 4.14.2
UE - Editor - Content Pipeline - Import and Export - Jan 5, 2017This is a regression in behavior between 4.14.1 and 4.14.2! The editor will crash when importing FBX meshes that have multiple material ID assignments. If it's a single material ID it will import w ...
3D widgets not clickable by Client 2 in multiplayer
UE - Editor - UI Systems - Dec 8, 2014When using a 3D widget the user cannot click on buttons when on the client 2 of a multiplayer game. ...
Hardware Accelerated Video Decoding with DirectX 11 causes videos to render black when loaded in a Media Player
UE - Media Framework - Sep 7, 2023This is not a regression. Tested in //UE5/Release-5.2 CL26001984. Hardware Accelerated Video Decoding requires DirectX 11, but it appears the combination causes media players to only render a black ...
Weird results in lightmaps after update to 4.21.2
UE - Graphics Features - Feb 4, 2019Reported by our licensee Gungho. Reproduced in 4.21.2, win10 ...
Running PIE with a dedicated server with 2 or more clients will clear undo buffer
Tools - Apr 29, 2016The user can no longer undo in the editor after running a dedicated server with 2 or more players ...
Updating C++ projects with Marketplace plugins in 4.25.2 fails to build project
UE - Foundation - Cpp Tools - Plugin System - Jul 24, 2020Projects created in previous engine versions fail to build in 4.25.2Running D:/Epic Games/UE_4.25/Engine/Binaries/DotNET/UnrealBuildTool.exe Development Win64 -Project="D:/Unreal Projects/MyProject4 ...
With Accurate Velocities from Vertex Deformation and Instanced Stereo enabled anti-aliasing does not affect the right eye
UE - Platform - XR - Jul 8, 2016KevinR: Make sure you are using Temporal AA (TXAA), and I was using SteamVR/Vive With Accurate Velocities from Vertex Deformation and Instanced Stereo enabled anti-aliasing does not affect the righ ...
C++ Projects Crash in Mac OS 10.11 El Capitan when No Audio Device is Present
UE - Platform - Apple - Dec 22, 2015This issue has been reported by two different users with very similar circumstances: Both report the editor freezing when trying to compile UE4.10 C++ Projects running Mac OSX 10.11.1 if no audio i ...
SkyLight is not affecting the volumetric fog
UE - Graphics Features - Lumen - Nov 24, 2022Looks like this behavior was working as expected until 5.1 Preview 2 ...
Outliner eye toggle fails to hide static meshes when Affect Indirect Lighting While Hidden is enabled
UE - Rendering Architecture - Nov 5, 2025When a static mesh has the property Affect Indirect Lighting While Hidden enabled, toggling its visibility via the Outliner eye icon does not hide the mesh in the editor viewport. The actor remains ...