Unreal Engine Issues
Unreal Engine Issues
Control Rig + Animation in Sequencer Can Lead to Unexpected Slider Reset
zComponent - Archive - Mar 30, 2026When a character has both a Control Rig track and an Animation track, interacting with any slider in Sequencer can be interrupted. ...
CSM Cached Shadows missing when changing FOV
UE - Rendering - Graphics Features - Shadows - Mar 30, 2026When changing the camera FOV with r.Shadows.CSMCaching enabled, the cached shadows don't appear to be used and shadows are missing. This occurs because the r.Shadow.RadiusThreshold can be low enoug ...
Hair Shadows Not Affecting SSS Back Scattering (Subsurface Profile)
UE - Rendering - Graphics Features - Mar 30, 2026Groom strands do not appear to correctly block transmitted light for Subsurface Scattering Profile Materials. In some cases, not only will they not block the light, but can instead lead to more ligh ...
Issue with r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat
UE - Rendering - Features - Mar 30, 2026When "r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat=1", some values for the Sky Atmosphere at some directional light angles can lead to the sun disk being cut off, and taking on a chord shape. A ...
Downloaded Megascans assets cannot be accessed while offline
TM - Core - Mar 30, 2026Reported in SF [Link Removed] When launching and using Twinmotion 2025.2 or 2026.1 offline, the Megascans library becomes unusable due to the subfolders of the 3D assets, 3D plants, Surfaces and De ...
FarShadow range not considered in GetViewDependentWholeSceneProjectedShadowInitializer
UE - Platform - Mobile - Mar 30, 2026Cascade index 0 is passed into GetViewDependentWholeSceneProjectedShadowInitializer. I think the intent of MaxShadowCascades = 1 and requesting cascade index 0 is to get a single bounding volume for ...
Incorrect CRC hash for shared fragments with FInstancedStruct member
UE - Engine Scaling - Mass - Mar 30, 2026User has encountered an issue with shared fragments that contain a member variable of type FInstancedStruct. It appears that UE::StructUtils::GetStructInstanceCrc32() does not correctly compute the ...
UPlacementSubsystem does not respect AssetFactories priorities, which is inconsistent with UEditorEngine::ActorFactories and makes it impossible to override placed actor type when dragging asset from Content Browser to Level Editor Viewport.
UE - Editor - Workflow Systems - Mar 30, 2026Note: This issue was reproduced in UE 5.7, and it works correctly in UE 4.27. Prior to CL 24938100 (between UE 5.1 and 5.2), all existing factories were discovered and registered during engine init ...
"Allow Sequencer Edits Only" and Control Rig performance impact
zComponent - Archive - Mar 27, 2026We noticed an issue working in sequencer with "Allow Seqeuncer Edits Only" and control rigs. Performance will drop when manipulating using the AnimDetails channel sliders. ...
Crash when switching from Lumen visualization to raytracing visualization
UE - Rendering - Graphics Features - Mar 27, 2026When switching from Lumen visualization to raytracing visualization via the console, the editor can crash to desktop. The crash appears to happen deep within the driver libraries, and does not trig ...