Unreal Engine Issues
Unreal Engine Issues
Build crash when enabling r.CreateShadersOnLoad=1
UE - Rendering Architecture - Shaders - Nov 10, 2025When "r.CreateShadersOnLoad" is enabled, cooking will crash due to failure to create a shader. This occurs on //UE5/Release-5.5, CL: 41545209 and //UE5/Release-5.6, CL: 45232827 ...
"Visualize Level Instance Editing" defaults to on, during sequencer playback (for sequences withing a level instance)
UE - Anim - Sequencer - Nov 7, 2025Version: Main branch 46320669; 5.7 Preview Epic Launcher pre-built; Issue: Playing a <sequence> that is withing a <level instance> turns back on gray <level instance editing> visualizing shader e ...
WorldPartitionConvertCommandlet hits an assert when converting a persistent level that contains a sub-level with a landscape
UE - World Creation - Worldbuilding Tools - Nov 7, 2025Context: The Window tab allows a user to open the Levels window in order to add a sub-level to a persistent level. For Unreal Engine 5.0 and beyond, World Partition has made the Levels window obsole ...
5.6 Skeletal Meshes with Disabled Sections Flicker in Ray Tracing Scene
UE - Graphics Features - Ray Tracing - Nov 7, 2025Skeletal meshes with disabled mesh sections will flicker in the Hardware Ray Tracing Scene. Also tested on //UE/Release-5.6, CL:45232827 ...
Adding a streamed empty LevelInstance in a WP level will result in an incorrect mapcheck error
UE - World Creation - Worldbuilding Tools - Level Instances - Nov 7, 2025This is an edge case that can also be caused when a Level only contains actors were `SupportsExternalPackaging` is false. This is likely the case for the "empty" level which surely contains a Level ...
Landscape Splines in Partially Loaded World Partition Levels Can Cause Nanite Landscape Invalidation
UE - Graphics Tools - Terrain - Nov 7, 2025Certain placements of landscape splines in world partition levels can cause Nanite landscape proxies to invalidate, and switch back to their non-nanite version. This happens when specific regions of ...
Sequencer Crash when Hovering over Binding Properties on a Component with Spaces in its Name
UE - Anim - Sequencer - Nov 7, 2025Crash when binding to new components that have spaces in their name and you attempt to access their bindings. ...
Animation Constraint Jitter in Sequence when Constraining Layered Control Rig node
UE - Anim - Anim in Engine - Nov 6, 2025When using constraints with layered control rigs, you get jitter on the constrained object. ...
Rotator visual helper appears in local Presentation exports
TM - Tools - Nov 6, 2025Reported in SF [Link Removed] The Rotator animator's visual helpers will be visible in locally exported Presentations when it should be hidden. This does not affect the Translator animator. ...
TSparseArray NatVis visualizer doesn't work for arrays that use TInlineSparseArrayAllocator
UE - Foundation - Cpp Tools - Nov 6, 2025The NatVis visualizer allows many custom Unreal types to be displayed in a helpful manner inside the Visual Studio watch window. One such type is TSparseArray. Under normal circumstances, visualizin ...