Unreal Engine Issues
Unreal Engine Issues
Cannot specify custom window positions in "windowed mode" for packaged games
Tools - Nov 30, 2017There is an issue where you cannot specify a specific location for a windowed packaged game when using a command line to open the project, the project will move to that position for a brief moment b ...
Static mesh's material slot's cast shadow does not require a build of StaticLight
UE - Graphics Features - Dec 7, 2017If static mesh's material slot's cast shadow is changed, UE4 does not show "LIGHTING NEEDS TO BE REBUILT". I solved it with the following fixes. StaticMeshEditorTools.cpp void FMeshSectionSettin ...
Cannot run any packaged project if "Force all skinned meshes to recompute tangents" has been enabled in an unrelated project
UE - Foundation - Core - Apr 20, 2018Enabling the "Force all skinned meshes to recompute tangents" sets the value at a Windows user level so that it affects all UE4 projects opened by that user, including unrelated packaged projects. T ...
Children of editor-only actors do not maintain correct transforms when placed inside level instances for PIE and cooked builds
UE - World Creation - Worldbuilding Tools - Level Instances - Oct 20, 2025We have found an issue where children of editor-only actors get wrong transforms in PIE and cooked builds when placed inside level instances. This affects both engine version 5.5 and 5.6. The issue ...
Unnecessary files in Perforce Depot
Several unnecessary files seem to have found their way into the Perforce depot and need to be cleaned up. Affected files:Engine/Documentation/Source/Engine/Matinee/HowTo/MHT_3/Images/MHT#_Drag_In_C ...
Skewed Rotation values from camera actors in print string
UE - Gameplay - Sep 25, 2017When using the camera actor and modifying the rotation values, the values made in the print string do not seem to match the actual values of the camera's rotation. The values appear to be close, but ...
Complex collision mesh might lose its collision in the editor
UE - LD & Modeling - Modeling Tools - Mesh Editing - Feb 18, 2020This is affected by loading order. In the case, display mesh was loaded firstly and try to build collision mesh form complex collision mesh asset. But the collision mesh didn't finished to make Ren ...
Destruction mesh with Crumble Smallest and Impact near another will leave residual mesh visible
UE - Simulation - Physics - Destruction - Jan 28, 2015When using a DM that has Crumble Smallest and Impact damage enabled there will be instances where the residual mesh before fracture is left behind. What appears to happen is there is a force large e ...
[CrashReport] UE4Editor_Engine!UTextureRenderTarget::GameThread_GetRenderTargetResource() [texturerendertarget.cpp:44]
UE - Editor - UI Systems - Jul 21, 2017This is a common crash that has been affecting users since at least 4.15. This may be the same issue as [Link Removed], which was closed due to inactivity User Descriptionsloading a level Source ...
[CrashReport] FindWindowByHWND | IsCursorDirectlyOverSlateWindow
Tools - Nov 21, 2017This is a common crash in the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred. The callstack shares some similarities to [Link Removed] Source Conte ...