Unreal Engine Issues
Unreal Engine Issues
Point Lights Invlidate Virtual Shadow Map Cache when at a distance from attenuation radius
UE - Graphics Features - Oct 28, 2025When the camera is outside of a certain distance from a point lights attenuation radius the VSM of that point light stops caching shadow maps. This can also be reflected in the output from the 'r.S ...
Uploading of the SBT via copy queue is not guaranteed to be synced with async compute queue but only direct queue in d3d12
UE - Graphics Features - Ray Tracing - Oct 28, 2025When HitLighting is enabled, SBT commit is running on the Graphic Queue, and the pass "LumenSceneLighting->offscreenshadows->LumenDirectLightingHardwareRayTracingRGS" that uses SBT could run on the ...
World Partition view has different orientation compared to top-down orthographic view
UE - World Creation - Worldbuilding Tools - World Partition - Oct 27, 2025Orthographic viewport orientations were re-worked as part of the effort to align UE's editing experience with other industry-standard DCC tools. The World Partition view is still using the legacy o ...
Variant Manager: LevelVariantSets asset corruption after rename or duplicate
UE - Editor - Content Pipeline - Oct 24, 2025When renaming or duplicating a LevelVariantSets asset that contains a Director Blueprint, the internal DirectorClass reference becomes mismatched. Although the DirectorBlueprint pointer updates corr ...
World Position Offset invalidates Point Lights Entire Virtual Shadow Map Cache when light frustrum is only overlapping a small portion of the mesh
UE - Graphics Features - Oct 22, 2025When adding a spotlight to the scene it does not correctly use cached virtual shadow map pages when the spotlight overlaps a mesh using WPO. This can be most easily observed by entering 'Cached Pag ...
Body Setup of a Static Mesh with Simple Collision will pass validation, but removing it and using only a Complex collision and setting Collision Complexity "Use Complex as Simple" will fail validation: "Bone None requires at least one collision shape".
UE - Simulation - Gameplay - Oct 20, 2025Context: By default, Unreal Engine creates both simple and complex shapes, then, based on what the user wants (complex query versus simple query), the physics solver will use the corresponding shape ...
Children of editor-only actors do not maintain correct transforms when placed inside level instances for PIE and cooked builds
UE - World Creation - Worldbuilding Tools - Level Instances - Oct 20, 2025We have found an issue where children of editor-only actors get wrong transforms in PIE and cooked builds when placed inside level instances. This affects both engine version 5.5 and 5.6. The issue ...
[Interchange] FBX - Front Facing X-Axis and Flipped Bone Orientation During Animation
UE - Anim - Runtime - Oct 15, 2025Actors attached to a skeleton imported through a FBX file with the Front Facing X-Axis option enabled are flipped when the skeleton is animated. ...
Intermittent Content is Missing from Cook errors for objects with Niagara packages
UE - Niagara - Oct 15, 2025Intermittently when cooking large licensee projects, an error is reported at the end of the cook:LogCook: Error: Content is missing from cook. Source package referenced an object in target package b ...
Smart Link inactive by default when NavLink is a ChildActor
UE - AI - Navigation - Oct 14, 2025When placing a NavLinkProxy in ChildActor, the link is not enabled by default. In this situation, setting SetSmartLinkEnabled to true does not establish the connection. You must first set it to fal ...