Unreal Engine Issues
Unreal Engine Issues
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 ...
[Crash] Failed to CreatePipeline on Vulkan ES31 with a special material graph
UE - Rendering Architecture - RHI - Apr 8, 2025Sampling 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 ...
External Data Layers content not there when activating game features during runtime
UE - World Creation - Worldbuilding Tools - Data Layers - Apr 7, 2025Crash in GPUMessage.cpp when resetting FSocket when RHI is NullRHI.
UE - Rendering Architecture - RHI - Apr 5, 2025When tearing down a nanite project with the nullrhi active, there is a crash in the FeedbackManager destructor that causes any exit to be unclean. The teardown process causes a crash as the destruc ...
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 ...
Blueprint asset tabs move around weirdly when you navigate between them with too many open
UE - Editor - Workflow Systems - Apr 3, 2025The "parent class type" text changing size causes the tabs to shift around a lot when you have a lot of them. We need to figure out a better place for this text to avoid the issue ...
Non-Nanite Instanced Static Mesh Collision not showing in collision view
UE - Simulation - Physics - Apr 3, 2025This issue is the same as [Link Removed], but it causes confusion for developers because only Nanite ISM are rendered correctly since UE5. . ...
Editor crash while saving asset during cook operation
UE - Foundation - Data Pipeline - Cooker - Apr 2, 2025It is possible to experience an editor crash in 5.5.4 when the cook process generates a warning that references an asset while the editor is saving. It seems that during a save operation, the code t ...