Unreal Engine Issues
Unreal Engine Issues
LandscapeSplineMeshesActor instances not deleted when World Partition is disabled
UE - World Creation - Worldbuilding Tools - World Partition - Oct 30, 2024When landscape splines exist in a WP level, LandscapeSplineMeshesActor instances are created to allow streaming of splines. In a non-WP level, splines are components of the landscape actor. When a W ...
It is possible for PreLoadScreen to leak memory when an EngineLoadingScreen returns IsDone while still loading
UE - Graphics Features - Jan 9, 2025It is possible for a class that implements IPreLoadScreen to leak memory if GetPreLoadScreenType returns EngineLoadingScreen and IsDone returns true before the engine signals loading is completed vi ...
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 ...
Natively declared Gameplay Tags aren't counted by Reference Viewer when set default by ctor
UE - Gameplay - Jul 11, 2024Similar to Issue 199247 ([Link Removed]), Natively declared Gameplay Tags aren't counted by Reference Viewer when used in a variable set in a C++ ctor. ...
Discrepancy in FBX import on animations
UE - Editor - Content Pipeline - FBX - Mar 19, 2025In the attached screenshots, the following Animation Sequence assets are wrong: * FX_WST050_pSphereB1_TS_AnimFX_WST050_pSphereC1_TRS_AnimFX_WST050_pSphereC1_TRS_AnimFX_WST050_pSphereD_TR_Anim If yo ...
Arrays in UMaterialEditorInstanceConstant are not updated
UE - Rendering Architecture - Materials - Jun 13, 2025Any UPROPERTY TArray added to UMaterialEditorInstanceConstant will not cause UI updates when elements are added or removed. This is caused by the custom validator created in FMaterialInstanceEditor ...
Volumes visible on screen cannot be selected with box selection if "Box Select Occluded Objects" is enabled
UE - Editor - Workflow Systems - May 22, 2024When using box selection with "Box Select Occluded Objects" enabled, volumes in the box selection zone are not able to be selected. ...
Virtual Bones Are Not Retained in Retargeted Animation Aim Offsets
UE - Anim - Rigging - Retargeting - May 13, 2022Occurs 5/5 times Virtual Bones are not retained in Retargeted Animation Aim Offset. Regression does not occur as UE5 Manny assets are not available for retargeting before UE5. ...
Distance Field AO from Moveable Skylight (non-Lumen) invalidates AO incorrectly with a screenspace offset to the right of moving objects
UE - Graphics Features - Mar 25, 2025When Global Illumination is set to “None” in the project settings the ambient occlusion does not correctly render shadows for moving objects. This has been observed in versions 5.4 and above. ...
Editor crash when building lighting and world partition minimap
UE - World Creation - Worldbuilding Tools - World Partition - Apr 17, 2025It is possible for an editor crash to occur if a build is running (Lightmass in this case) and another is launched such as Build World Partition Minimap (as well as HLOD and Spline builders). This i ...