Unreal Engine Issues
Unreal Engine Issues
UMaterialBillboardComponent does not render when moving
UE - Graphics Features - May 19, 2022Marking this as a Regression since it works as intended in Release 4.27.2 (CL-18319896). I've also confirmed the behavior is occurring in UE5 Main (CL-20283975) as well. ...
bIgnoreAllPressedKeysUntilRelease only applies to keys in the previous mapping
UE - Gameplay - Input - Jun 16, 2022This is because the RebuildControlMappings function only checks this flag when you have a mapping that was already added, we should apply this for any new mappings as well. I'll update the repro s ...
Physics Constraint returns incorrect values for Swing1, Swing2, and Twist
UE - Simulation - Physics - Jul 7, 2022Tested in //UE5/Main CL#20966071 Tested in //UE4/Release-4.27 CL#18319896 Physics Constraint returns incorrect values for Swing1, Swing2, and Twist. ...
Disabling bLerpUVs in Nanite Settings of Static Mesh causes texture warping in clusters
UE - Graphics Features - Nanite - Jan 21, 2025The licensee has identified a potential fix by changing if( Settings.bLerpUVs ) to if( Settings.bLerpUVs || UVIndex == 0 ) On line 389 of NaniteBuilder\Private\Cluster.cpp in UE 5.5 ...
Copy-pasting custom property nodes (ControRig etc.) results in invalid bindings, perf issues
UE - Anim - Rigging - Control Rig - Jul 28, 2025From this UDN: [Link Removed] Suggested fix:Override PostPasteNode to perform the GUID update andAdd validation on load to strip 'invalid' copies that do not correspond to a valid pin input ...
Crash when changing shadow scalability settings to low, then clicking in the viewport
UE - Graphics Features - Jun 9, 2016A crash occurs after setting the shadow scalabilty settings to "low" then clicking on an item in the viewport. The issue also occurs when setting all of the scalabilty settings to low at one time as ...
Geometry Material Alignment not functioning in 4.8
Tools - Jun 15, 2015Material Alignment on BSPs are not functioning in 4.8.0 Release. This is a regression from 4.7.6. The issue does appear to be fixed and functional in 4.9 (Promotable-CL-2581018) ...
GameMode::StartNewPlayer calls RestartPlayer() without checking PlayerCanRestart()
UE - Gameplay - Nov 11, 2015Bug report from UDN thread. https://udn.unrealengine.com/questions/266937/gamemodestartnewplayer-calls-restartplayer-without.html#answer-268579 His point seems sound, we should fix it. ...
[CrashReport] FBX import crash - UE4Editor_UnrealEd!TSet<TPair<unsigned int,FMeshSectionInfo>
Tools - Jan 12, 2017This crash was introduced in 4.14.2, and is very similar to [Link Removed], however it is still occurring in 4.14.3 (after that fix) According to submitted crash reports, this one is not very wides ...
Editor crash with Japanese ATOK input(candidate list related)
UE - Editor - UI Systems - Localization - Jul 5, 2017This is probably a continuation from [Link Removed]. [Link Removed] fixed the crash with MS-IME input, but crash/instability can still happen with another Japanese input system, ATOK. ...