Unreal Engine Issues
Unreal Engine Issues
Lack of multi-bounce when using software traced lumen radiosity
UE - Rendering - Features - Lumen - Apr 4, 2025Certain Lumen Hardware Ray Tracing CVars, when disabled in isolation, will not fall back to tracing the Global Distance Field, because the Global Distance Field is still disabled. The function "Lum ...
Cursor breaks viewport when using Widget Render Transform Scale
UE - Editor - UI Systems - Mar 14, 2017The viewport cursor will continue to display off of the actual viewport until the widget ends if the border component actually extends. This has not been tested with any other template. Regression ...
[CrashReport] UE4Editor_SlateCore!TIndirectArray<SOverlay::FOverlaySlot,FDefaultAllocator>::DestructAndFreeItems() [indirectarray.h:444]
Tools - Nov 17, 2017This is an infrequent crash in the 4.18 release. Based on individual crash details it seems frequently related to Sequencer. Users have not provided any descriptions of their actions when the crash ...
Cannot set the Rotation value of an Instance Static Mesh component if the scale is set to zero
UE - Gameplay - Feb 3, 2015Cannot set the Rotation value of an Instance Static Mesh component if the scale is set to zero. This can be done with StaticMesh components and standard Static Meshes in the level. ...
Get Instances Overlapping Box node does not pick up overlapped instances
UE - World Creation - Worldbuilding Tools - Foliage - Aug 9, 2016Get Instances Overlapping Box node does not recognize instanced meshes overlapping the box. The bounds of the box make no difference, nor does having the box test for instances within the same bluep ...
Creating TArray of components does not allow component elements to be edited in blueprints
UE - Gameplay - Blueprint - Mar 8, 2016When an array is used to declare actor components, the component elements that make up the array cannot be edited inside blueprints. ...
Linux Multi-Monitor Support Issues on GNOME Shell
UE - Platform - Linux - Dec 6, 2017Users with GNOME Shell installed have reported having issues with multi-monitor support when the monitors are not equally sized or the same aspect ratio. If the application is moved from a smaller ...
GPU Crash from invalid SRV in CreateShaderResourceView due to integer underflow
UE - Rendering - Features - Ray Tracing - Jan 13, 2025The GPU crashes after the ray tracing geometry builder attempts to create a shader resource view with an invalid offset. ...
GPU Crash from invalid SRV in CreateShaderResourceView due to integer underflow
UE - Rendering - Features - Ray Tracing - Jan 15, 2025The GPU crashes after the ray tracing geometry builder attempts to create a shader resource view with an invalid offset. ...
Enhanced Input: use-after-free in EvaluateInputComponentDelegates when a delegate forces a synchronous mapping rebuild
UE - Gameplay - Input - Sep 21, 2026Context UEnhancedPlayerInput::EvaluateInputComponentDelegates iterates the delegates that triggered this tick. For each one it resolves the action's state via FindActionInstanceData(DelegateAction) ...