Unreal Engine Issues
Unreal Engine Issues
Sky appears black in some exported renders
TM - Rendering - Jun 24, 2025Reported by beta user in SF [Link Removed] User exported an image with Path Tracer and the exported render displayed the sky as black. This issue seems to be very low repro, and neither myself or ...
Standalone Material Function Instance creation results in crash
UE - Rendering - Architecture - Materials - Mar 2, 2023Coming from UDN https://udn.unrealengine.com/s/case/5004z00001mDBzzAAG/material-instance-asset-creation-workflows?fromCase=1 Either standalone MFI creation should work just like MaterialInstances, ...
Lyra: OnSpawn player abilities can fail to activate on client in networked sessions
UE - Gameplay - Gameplay Ability System - Nov 12, 2024A licensee who built their game on top of Lyra has reported that OnSpawn abilities, which is a feature provided by the LyraGameplayAbility base class via its ActivationPolicy, have a chance of faili ...
Parameter metadata not accessible if modified in Material Instance and then converted to CustomPrimitiveData
UE - Rendering - Architecture - Materials - Jun 24, 2026There’s a potential issue with some changes we made to UMaterialInstance::GetParameterValue (https://github.com/EpicGames/UnrealEngine/commit/8f2bebb008ba645f5938da844cd46b0925322b13). It seems as t ...
[CrashReport] UE4Editor_Engine!FSceneView::FSceneView() [sceneview.cpp:627]
UE - Editor - UI Systems - Slate - Apr 11, 2017Opening UE4.14 using thecommand line "-forceenablecrashtracker," results in a red circle on the top right of the editor that when clicked provides a link to a 20 second video recorded from when you ...
GetUniqueBuildID should use GetLocalNetworkVersion for default value
UE - Automation Test - Nov 13, 2018See https://udn.unrealengine.com/questions/466694/index.html GetUniqueBuildID() was changed in 4.20 so the value returned by default was the same as the network version. However FNetworkVersion::Ge ...
Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled
UE - Graphics Features - Jul 19, 2019Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled. Working as expected in 4.22 CL# 7053642 Found in 4.23 Preview 2 CL# 7321677 and 4.24 CL# 7437539 This is a regression ...
Landscape that has tessellation enabled sometimes doesn't render in cooked build
UE - LD & Modeling - Terrain - Landscape - Jun 18, 2020If a landscape uses a material that has tessellation enabled. Then in Editor and PIE things render correctly. But in a cooked package we sometimes hit this check. check(!bCurrentRequiresAdjacencyI ...
Sandbox Visitors can fail on empty directories on non-Windows platforms
UE - Core - Systems - Jul 11, 2024When a Sandbox Visitor checks a directory and it doesn't exist, it returns true on Windows and false on other platforms. The code that uses the result of this check, IterateDirectory, doesn't conti ...
LIVE: Deleting a folder in the content brower shows unrealted assets
UE - Editor - Content Pipeline - Content Browser - Aug 25, 2014User Description: Upon deleting a subfolder in the content browser, your currently open folder displays many objects from other folders as well. Summary: Deleting a folder will cause the content b ...