Unreal Engine Issues
Unreal Engine Issues
UPoseAsset::SetBasePoseName() always sets INDEX_NONE
UE - Anim - Runtime - Apr 11, 2025UPoseAsset::SetBasePoseName() does not correctly set the BasePoseIndex when a valid pose name is provided. Regardless of input, the pose defaults back to ReferencePose. Upon inspection of the implem ...
Nanite TwoSidedSign is backwards
UE - Graphics Features - Nanite - Apr 10, 2025The value of MaterialExpressionTwoSidedSign is flipped when calculating the Opacity Mask for Nanite meshes. This seems to be a regression in 5.5. ...
[CrashReport][Crash] UnrealEditor-Core!IMemoryReadStream::CopyTo()
UE - Rendering Architecture - Apr 10, 2025Intermittent crash in virtual texture transcode. Usually mempy from nullptr but also occasionally we see the same callstack with memcpy to random location. ...
Crash when attempting to change the parent of a material instance constant through editor scripting
UE - Rendering Architecture - Materials - Apr 9, 2025The built-in class "UMaterialEditingLibrary" provides various editor scripting functions related to creating and editing materials and material instances. One of these functions, UMaterialEditingLib ...
CitySample - Level MassCrowd - interactions with SmartObjects/ContextualAnimScene is broken in 5.5
UE - AI - Apr 9, 2025The 5.5 version of the CitySample project, particularly the MassCrowd scene, was not properly maintained. The previously working functionality of NPCs being able to sit on a bench is now broken. CAS ...
Sampling textures with bias in the path of a custom data pin causes derivative operations when avoidable
UE - Rendering Architecture - Materials - Apr 8, 2025Materials that make use of the analytical derivatives path to avoid hardware derivatives can still generate derivative operations on texture samples when the shading model has a custom data pin and ...
Network Prediction crash when smoothing service instance data is reallocated out from under FNetworkPredictionStateView
UE - Gameplay - Network Prediction - Apr 4, 2025Received a report from a licensee using Network Prediction Plugin and Mover. There is a strong likelihood of a crash occurring when using NPP's smoothing option and spawning new NPP-simulating ins ...
Crash when Undo after deleting a Material Layer of a Material Instance.
UE - Rendering Architecture - Materials - Apr 2, 2025In Unreal Engine version 5.5.4, the Editor crashes when performing Undo after deleting a Material Layer of a Material Instance ...
Option "Use Mouse for Touch" does not work correctly when running the game in "Standalone" or "New Editor Window (PIE)" modes: Virtual joystick does not appear and mouse cursor is incorrectly hidden while captured.
UE - Gameplay - Input - Apr 1, 2025The Editor provides option "Project Settings – Engine – Input – Mouse Properties – Advanced – Use Mouse for Touch" to allow testing virtual joysticks and other touch controls with the mouse. When ru ...
ChaosCacheManager is not recording the Observed GeometryCollections NotifyBreak states between level loading and will default to false if changed from Record to Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not recording the Observed GeometryCollections (GC) NotifyBreak states between level loading and will default to false if changed from Record to Play. AChaosCacheManager ...