Unreal Engine Issues
Unreal Engine Issues
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 ...
TOptional value changes in parent BP don't propagate to loaded child BPs
UE - Framework - Blueprint Editor - Oct 27, 2025Context TOptional<T> is a wrapping struct around a type, that lets the property have an set and unset state, in addition to the property's value when set. It is editor exposed: designers can open b ...
Control Rig - Undo doesn't function correctly with proxy and multi bone controls
UE - Anim - Rigging - Control Rig - Oct 26, 2025Issue from my Technical Animator where the undo operation in Control Rig doesn't work as expected on Proxy Controls. He has recreated the issue using the "Control Rig Samples Pack" and recorded a vi ...
bStaticWhenNotMoveable in Lighting category instead of Physics
UE - Simulation - Gameplay - Oct 24, 2025"UPrimitiveComponent::bStaticWhenNotMoveable"'s category is set to Lighting, not Physics. This causes it to be hidden when lighting-related properties are hidden, even though it controls physics sta ...
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 ...
Missing materials on the rear lights of library vehicles
TM - Content - Oct 24, 2025Reported in SF [Link Removed] The rear light material on Twinmotion library vehicles is not present on many vehicles in TM 2025.2. Confirmed affected vehicles are in the following categoriesCarsTw ...
Snap to nearest spline point no longer working in 5.6. Right clicking on a spline point and using the option “Snap to nearest spline point" will no longer snap that point to any nearby spline and will sometimes cause the spline to snap to itself.
UE - Gameplay - Oct 22, 2025Context: When editing SplineComponents in the level viewport, right clicking a spline point has a context menu action "Snap to nearest spline point". Problem: The problem is, Snap to nearest spline ...
RuntimeCellTransformers can result in increasing the instance count when a BP instance is not destroyed.
UE - World Creation - Worldbuilding Tools - Oct 22, 2025The problem is related to the SimpleConstructionScript that executes on the BP instances after the transformer. The problem also happens at cook time as the SCS is executed when the package is sav ...
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 ...
Child actor components fail to attach in cooked builds when mobility is set to movable and end up at the origin
UE - Gameplay - Oct 21, 2025Context: A Child Actor Component allows an actor in Unreal Engine to contain another actor as its child (component). Problem: The problem is inconsistent handling of child actor component mobility ...