Unreal Engine Issues
Unreal Engine Issues
Adding Images: The image header is unrecognized
RC - Editor - Feb 14, 2025This issue occurs only on Windows 11 24H2, but it affects all RealityCapture versions on this OS. It is allso not possible to open the images with the Windows Photos App. ...
TSR ghosting when see through translucent wall
UE - Graphics Features - Feb 7, 2023see through a translucent material will cause ghosting This issue did not occur in 5.0, it occurs when using TSR on UE 5.1 or later. ...
Opcode shader compilation error when using a TextureSampleParameterCubeArray node with hardware ray tracing enabled
UE - Graphics Features - Ray Tracing - Mar 31, 2025Materials containing a cube array texture sampling node will not compile when hardware ray tracing is enabled. The shader compilation error indicates that an invalid op code was used: "Opcode Sample ...
shared texture sampler doesn't work in mobile
UE - Platform - Mobile - Jan 5, 2023In mobile preview or android device in 5.1 release, M_SharedTexture_Inst material does not render properly due to exceeded sampler slot limit. there was no problem in 5.0.3 ...
Cannot Delete Landscape with World Partition enabled
UE - Graphics Tools - Terrain - Landscape - Jan 12, 2023If you delete all the LandscapeStreamingProxies under the landscape object the parent landscape object can be deleted. Not a regression checked in Version: 5.1.0-23058290+++UE5+Release-5.1 ...
In editor, sub level instance's streaming state persists incorrectly after toggling Level Behavior without saving
UE - World Creation - Worldbuilding Tools - Level Instances - Jun 11, 2025When adding a sub level with world partition streaming to a main level where the streaming is also enabled, setting* Level Behavior* of the sub level to Standalone, and saving the result, in the fir ...
LandscapeStreamingProxy do not properly save z offset from world composition, level property.
UE - World Creation - Worldbuilding Tools - World Composition - Aug 21, 2018LandscapeStreamingProxy seems not properly saving z offset from level details when using world composition. It is reset to 0 when reopening the project. z position value from level details is saved. ...
Temporal blur artifacts on Geometry Cache Components in Blueprint actor
UE - Editor - Content Pipeline - Alembic - Jan 9, 2026When a Geometry Collection is in a Blueprint, attached to other components, it can render incorrect motion vectors at some angles. In the test project, any angle that is not a multiple of 45 will re ...
Inconsistent events triggered by FlushProcessedKeys during keyboard hold input
UE - Gameplay - Input - Dec 20, 2024Key repeats from the OS do not affect the EnhancedInput normally, but it causes inconsistent event triggers when FlushProcessedKeys is called with holding a keyboard key down. Removing references t ...
BlackboardComponent observer can be called for the wrong key
UE - AI - BehaviorTree - Feb 7, 2023We need to, at least, prevent this by clearing observers when running a new BT using a different blackboard. Must also think that this might affect licensees relying on the current behavior (might h ...