Unreal Engine Issues
Unreal Engine Issues
[PCG] Undoing the deletion of a pcg actor removes the Instance Category from the pcg component, specifically no graph parameter can be seen.
UE - Graphics Tools - PCG - Components - Oct 31, 2025Context: PCGComponents on actors contains a category "Instance" that allows the user to connect a PCG Graph of their choosing to the PCGComponent which allows the Procedural Node Graph to sample the ...
Reflections of Masked Materials incorrect with Lumen HWRT and Max Refraction Bounces > 0
UE - Rendering - Graphics Features - Lumen - Dec 18, 2025Lumen HWRT Reflections of Masked Materials are incorrect when "r.Lumen.Reflections.HardwareRayTracing.Translucent.MaxRefractionBounces" is greater than 0. The same issue occurs if the Post-Process V ...
FCameraShakePreviewer retains world-outered UCameraShakeBase instances indefinitely, fataling CheckForWorldGCLeaks on editor map change
UE - ACT Character - Sequencer - Aug 21, 2026FCameraShakePreviewer is an FGCObject that strongly references the UCameraShakeBase instances it previews, and creates them outered to the previewed UWorld. Nothing releases them on world teardown, ...
Level Merging creates a new empty level and deletes only one of the two levels merged
Tools - Oct 29, 2014After merging two levels in the Levels window, only one of the two levels will be deleted and a new level will be created. Any actors in the deleted level will be deleted as well. The new level will ...
Media Sound Wave Does Not Play after Packaging
Tools - Mar 19, 2015After testing multiple different ways to get a Media Sound Wave to play in sync with the associated Media Player Asset, I feel it is very hard to get the sound to even play. Not mentioning getting i ...
LIVE: Control+Right (Skip Word) in Multi-Line Text Field Freezes Editor
Tools - Oct 30, 2014In any multi-line text field, scrolling to the end of the last line with the control+right (skip word) command will freeze the editor. In the AnswerHub thread, user twiddle linked to a Pull Request ...
Can only render Matinee movies with Separate Process
Tools - Aug 23, 2016Can only render Matinee movies with Separate Process. ...
The Merge Actors Tool doesn't account for rotated collision shapes when doing non-uniform scaling
UE - Gameplay - Aug 30, 2016Collision shapes for merged actors using the Merge Actor tool do not account for the rotation of the actor when combining the data. It looks like the X and Y collision shape rotation in the world ...
Reroute nodes break Cached Poses in AnimBPs
OLD - Anim - Sep 2, 2016Reroute nodes break Cached Poses in Animation Blueprints Regression: This does not occur in 4.12 ...
BSPs cannot be selected through other BSPs set to hidden
UE - LD & Modeling - Modeling Tools - BSP - Nov 17, 2015BSP brushes cannot be selected through other BSP brushes that are set to hidden through the world outliner. Other assets such as static meshes are unaffected by this or do not cause the same error t ...