Unreal Engine Issues
Unreal Engine Issues
World partition mini map fails to build with an Unhandled Exception while using r.Raytracing.Nanite.Mode=1
UE - Graphics Features - Jan 31, 2023This is a regression. Tested in //UE5/Release-5.0 CL20979098 Build mini map fails with an Unhandled Exception while r.Raytracing.Nanite.Mode=1 is enabled in the DefaultEngine.ini. ...
Crash when clicking "Reset to Default" button on the Details Panel for the MaterialAttributeLayers material node.
UE - Rendering Architecture - Materials - Jul 15, 2025This crash repros from at least UE 5.3 and up to latest. The following assert is hit: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 1067] Array index out of bounds: 0 in ...
Changing number of existing UHierarchicalInstancedStaticMeshComponent in Blueprint causes crash.
UE - Graphics Features - Oct 14, 2016If using a UHierarchicalInstancedStaticMeshComponent in a C++ class and adding instances via the OnConstruction( ) function, editor can crash. ...
Unable to input Chinese characters (Microsoft Pinyin) after inputting 34 half-width characters
UE - Editor - UI Systems - Slate - May 2, 2024If we enter Chinese characters using Microsoft Pinyin after entering 34 or more half-width characters in a text field, they are not reflected in the box. If less than 34 characters are entered, Chin ...
Incorrect mesh deformation when Max World Position Offset Displacement used
UE - Graphics Features - Nanite - Feb 12, 2025When Vertex Animated Texture is used to animate a mesh with World Position Offset, often the Max World Position Offset Displacement Material setting must be increased or the Bounds Scale increased, ...
[Stall] AudioMixerSourceManager::FlushCommandQueue when opening editor for asset
UE - Audio - Apr 7, 2022Live issue. Stall occurring for some users in the 5.0 Release. Currently hit 577 times by 500 users as of 2022-04-29 No specific project occurring on ...
Anisotropy renders differently in each eye in VR
UE - Platform - XR - Jan 10, 2023Regression: Tested in Release-5.0, this issue occurs so it is not a regression. This issue was first reported using the Automotive Materials assets, as the Anisotropy material on MI_Metal_Brushed w ...
r.AllowOcclussionQueries causing "huge RenderQuery Result" wait time in VR
UE - Graphics Features - Dec 3, 2019Running r.AllowOcclusionQueries 0 command seems to set bWait = true, causing large wait times Tested: 4.22.3 CL#7053642 , 4.24P4 CL#10387632 , 4.25 CL#10479005 Link to the users video, which ...
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 ...
Ensure when undoing the deletion of the RecastNavMesh - Top Down project
UE - AI - May 31, 2017While testing in //UE4/Release-4.16 CL 3466753 in Binary – I encountered an ensure when undoing the deletion of the RecastNavMesh. Regression: No This issue also occurs in //UE4/Main and //UE4/Rele ...