Unreal Engine Issues
Unreal Engine Issues
Movie Scene Capture - DX12 Render Artifacts and Delay
UE - Rendering - RHI - Jun 19, 2023If using the Legacy renderer (Movie Scene Capture) with DefaultRHI DirectX12, there's new delay and also some frames get weird artifacts. However, the delay and artifacts do not appear when using ...
Debug display of TargetingSelectionTask_AOE with cylinder is unnaturally tilted
UE - Gameplay - Gameplay Ability System - Oct 30, 2024The following code fixes the tilt : void UTargetingSelectionTask_AOE::DebugDrawBoundingVolume(const FTargetingRequestHandle& TargetingHandle, const FColor& Color, const FOverlapDatum* OverlapDatum) ...
Editor.Plugins.Tools.Modeling.EditorMode.ExtrudePolygons.* test cases fail in headless mode due to stylus error log.
UE - Graphics Tools - Modeling Tools - Jan 15, 2025Hello! In UE 5.5 Preview, new stylus code was introduced, which can cause a test failure in an unrelated test suite, Editor.Plugins.Tools.Modeling.EditorMode.ExtrudePolygons.*. The test indirectly ...
GLTFExporter indexing issue
UE - Editor - Open File Formats - glTF - May 29, 2025Hi, I also ran into an issue when exporting a skeletal mesh that has multiple sections that all share the same material slot. It looks like the index buffer that's constructed is incorrect. In GLTF ...
Soft angular constraints solve velocity like hard constraints
UE - Runtime - Simulation - Jul 17, 2025Soft angular constraints are solving velocity like hard constraints. Instead of swinging back and forth, the affected body just snaps to 45 degrees. Check the steps to reproduce for more details. Th ...
HISM causing massive spikes in BuildTreeAsync
UE - Rendering - Architecture - Feb 12, 2026Loading a world partition cell containing dense foliage (30k+ instances per cell) causes spikes on lower end hardware of up to 10-15ms and can observe spikes of 2-5ms on high end hardware too primar ...
Sequencer Crash (GC Leak) in Editor
UE - ACT Character - Sequencer - Aug 31, 2026A GC leak, similar to the one fixed by 44483919 but for Level Sequences in Level Instances rather than ones with Widgets. A Level Sequence Actor in a Level Instance points to a Level Sequence Asset ...
Packaged Game Crashes When Launched with the -dx12 for Ray Tracing Features and PixelStreaming enabled
PixelStreaming - Apr 3, 2019Packaged game crashes when launched with the -dx12 option and PixelStreaming is enabled. Found in 4.22 CL# 5660361 and 4.23 CL# 5704223 ...
Crash while closing Create Blank New Blueprint window after attempting to name blueprint the same name as another blueprint
UE - Gameplay - Blueprint - Jul 27, 2016Crash while closing Create Blank New Blueprint window after attempting to name blueprint the same name as another blueprint. This crash only occurs when attempting to close the window using the "X" ...
[CrashReport] UE4Editor_Engine!UEdGraphPin::Modify() [edgraphpin.cpp:619]
UE - Gameplay - Blueprint - Aug 29, 2017This is an infrequent crash coming out of the 4.17 release. User DescriptionsNICE PIN FIX NOW I CANT ADD VARIABLES NORMALLY Source Context 612 void UEdGraphPin::SerializeAsOwningNode(FArch ...