Unreal Engine Issues
Unreal Engine Issues
Possible shader preload deadlock when using Zen streaming
UE - Rendering - Architecture - Jun 12, 2026The deadlock happens when enough shader preload are launch in parallel on a slower IO backend (like zen). When that happens, the preload starts a waiting period that never ends because it cannot be ...
Nanite Landscape Visibility Layer Crash
UE - Graphics Tools - Terrain - Landscape - Jun 10, 2026Upon saving the level after creating the landscape and painting visibility, the editor crashes. When you restart the editor and load the level, you are greeted with a warning in the upper right corn ...
Custom Items and Inventory can appear enabled while actually being disabled
UE - Gameplay - System - Jun 10, 2026Toggling the Custom Items and Inventory setting and then closing the editor without saving can lead to a mismatch between the Project Settings Custom Items feature and the IslandSettings object in t ...
Material Layers cannot be re-ordered by dragging in the Material Layer Parameters tab
UE - Rendering - Architecture - Materials - Jun 9, 2026Material Layers cannot be re-ordered by dragging in the Material Layer Parameters tab even though there is UI for dragging the rows and the rows appear to be draggable. ...
Editor crashes when Material Layer visibility is toggled after removing a Material Layer in Parent
UE - Rendering - Architecture - Materials - Jun 9, 2026When a Material Layer is removed from a Parent Material, the Parent Material updates correctly in the viewport, but any Child Material Instance do not update correctly in the viewport until the Chil ...
Adding/Removing a Material Layer on a Parent Material doesn't propagate to Children correctly
UE - Rendering - Architecture - Materials - Jun 9, 2026When a Material Layer is added to or removed from a Parent Material the layer changes don’t automatically propagate to Child Materials correctly even if the Parent Material is saved. The Child mate ...
Toggling Material Layer visibility in Parent Material doesn't propagate to children
UE - Rendering - Architecture - Materials - Jun 9, 2026When Material layer visibility is toggled on the Parent Material in a Material hierarchy, only the Parent’s layer visibility is affected, the children are not. Saving the Parent material has no effe ...
Sequencer - if you set the Take Separator to - rather than _ the New Take naming will mess up
UE - CAPT - Sequencer - Jun 9, 2026When using a non-default take separator (eg "-") the "New Take" option produces a malformed proposed name for the take. ...
World Bookmark can't be saved when a Private Data Layer is "collected" by the UDataLayerEditorState
UE - World Creation - Worldbuilding Tools - Data Layers - Jun 9, 2026The World Bookmark system cannot properly handle Private Data Layer. The current state can make them unusable since the Bookmark might not be saveable. ...
[USD EXPORT] USD Exporter does not export subsequence data from the master sequence
UE - Editor - Open File Formats - Jun 9, 2026As described in the steps to reproduce, when exporting a selected binding somwehere in a sequence hierarchy into usd, the export yields an empty result when using 'selection only' option. The export ...