Unreal Engine Issues
Unreal Engine Issues
Intermittent crash in CacheOptimizeIndexBuffer on Editor startup on Linux
UE - Platform - Linux - Nov 16, 2015Building 4.10 from the GitHub release branch on Linux fails to open after install and instead crashes User Suggested Fix: Switching triangle order optimization off with r.TriangleOrderOptimization= ...
Improper include generated when C++ class is in a subdirectory
UE - Editor - Workflow Systems - Jun 7, 2022This is not a regression from 4.27.2, however, a similar issue was fixed in 4.26. Generating a C++ class that is in a subdirectory generates the #include "Subdirectory/Class.h" instead of #include ...
sg.EffectsQuality does not seem to update once set in the devices profiles or .ini file
UE - Platform - Mobile - Nov 7, 2016Effects Quality settings within the device profiles, or even set in the .ini file seem to be ignored. Even when you're calling sg.effectsquality in the console command, it's ignored. The only way I ...
Painted Vertex Colors not Passing Color when used with Emissive for Static Lighting Setting
UE - Graphics Features - May 24, 2016When painting Vertex Colors on a mesh, and enabling the 'Emissive for Static Lighting' option, the painted colors are not passed to surfaces receiving the emissive static lighting. The regular emis ...
Running a server from the editor will crash this project
UE - Networking - Mar 8, 2015Running a server from the editor will crash this project. Reproduced by using UE4Editor <projectname> -server -log to run the editor. This does not occur with a new project in 4.7.2 or in Main. ...
Set Morph Target not being sent to children of Inherited Mesh
OLD - Anim - Sep 4, 2015In previous versions of UE4, Set Morph target to call the Inherited Mesh and would result in any children of the Inherited Mesh that shared that morph target name to morph. In UE4.9 this no longer ...
Crash when entering Path Tracing view mode if r.Decal.NormalReprojectionEnabled true
UE - Graphics Features - Path Tracer - May 16, 2025Cash when entering Path Tracing view mode if r.Decal.NormalReprojectionEnabled true The licensee has reported: This crash happens because the DeferredShadingRenderer tries to extract the normal GBu ...
bIgnoreAllPressedKeysUntilReleaseOnRebuild in Enhanced Input behaves unexpectedly during pawn possession
UE - Gameplay - Input - Jun 11, 2025This is a speculative bug report from the user. The fix for this is to re-do the work of 31224705 but in a better way. The "bShouldBeIgnored" flag is being overriden by the previous mapping's va ...
All console variables overridden in Movie Render Queue are set to 0 after the render queue runs
UE - Anim - Sequencer - Aug 4, 2020All console variables overridden in Movie Render Queue are set to 0 after the render queue runs. It's because all cached previous console variables are reset to 0 just before they are written back ...
Viewport Renders Black when adding a Third Player using Splitscreen Multiplayer
UE - Graphics Features - Feb 24, 2016As the title suggests, whenever you attempt to add a third player using splitscreen, whenever the third player is created the viewport renders black. This only occurs when the viewport is sized to a ...