Unreal Engine Issues
Unreal Engine Issues
UObjects returned from "Get Item Children" in a TreeView widget causes an engine crash, due to invalid pointers
UE - CoreTech - UObject - Jun 9, 2020UObjects returned from "Get Item Children" in a TreeView widget causes an engine crash, due to invalid pointers. User has proposed the following fix: The best fix is probably such: When Slate list ...
Crash when using StaticDuplicateObject with mismathced Source and Destination class types
UE - Foundation - Jun 19, 2025Starting in Unreal Engine 5.4, StaticDuplicateObject internally switched to using Unversioned Property Serialization (UPS) for performance reasons. However, UPS assumes the source and destination ob ...
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 ...
Building Lighting will Generate Additional Lightmaps after Rotating Lightsource
UE - Graphics Features - Jul 7, 2015Lightmap sizes seem inconsistent after rotating a light source and rebuilding the lighting. This causes concern about file sizes when packaging the project that is using baked static lighting. The ...
Packaging fails when Online Framework Plugin is enabled in a Binary build.
UE - Foundation - Cpp Tools - Plugin System - Nov 29, 2017Enabling the Online Framework Plugin in a Binary build of the editor (download from the Epic Games Launcher) causes packaging attempts to fail due to a file that is missing. This does not occur in s ...
Duplicate .so files in GoogleVR.
UE - Platform - XR - Jun 2, 2017A licensee recently pointed out that there are now several GoogleVR lib files in 4.16 that are present in the Engine twice due to some of them being copied into a subdirectory. For example, , in 4.1 ...
Stencil that has been marked with ResponsiveAA is cleared by DistortionPass
UE - Graphics Features - Dec 14, 2021From UDN: When an object with ResponsiveAA enabled is in the screen and then an object with Distortion enabled comes into the screen, ResponsiveAA does not work. I guess this is because the Ste ...
Unable to undo editing enum description
UE - Gameplay - Oct 30, 2019The user is unable to undo the editing of the enum description. The output log and undo history would confirm that the undo was carried out, however it did not do anything in reality. Resetting the ...
Reflections Rendering Incorrectly in SM4
UE - Graphics Features - Dec 7, 2017Reflections are rendering incorrectly in Rendering Preview Level SM4 in 4.18, but were working as expected in 4.17. This is a regression. When I reproduce the issue, I get results similar to issue ...
Packaging with Steam VR plugin disabled requires an IDE
UE - Platform - XR - Jul 20, 2017Disabling the SteamVR plugin in a Blueprint-Only project causes the packaging process to require an IDE to complete, as it requires compilation. Regression?: Yes This did not occur in 4.16.2 Note: ...