Unreal Engine Issues
Unreal Engine Issues
Duplicating many Actors at once in a Level Instance while in Level Instance Edit will result in a jumbled mess of Actors on the Persistent Level
UE - World Creation - Worldbuilding Tools - Level Instances - Feb 12, 2025Duplicating many Actors at once in a Level Instance while in Level Instance Edit will result in a jumbled mess of Actors on the Persistent Level. The licensee has encountered this in Unreal 5.4 and ...
5.4, FRHIMemoryPool leaks memory
UE - Rendering Architecture - RHI - Feb 12, 2025FRHIMemoryPool will leak data when it is destroyed. "FRHIMemoryPool::Init()" will create "FRHIMemoryPool::DesiredAllocationPoolSize" new "FRHIPoolAllocationData" objects, stored in "FRHIMemoryPool: ...
When MotionExtrantorModifyer is applied to skeletal mesh, it outputs warning about module loading of AnimationModifierLibrary at editor startup in ThirdPerson C++ project.
UE - Anim - Runtime - Feb 12, 2025When MotionExtrantorModifyer is applied to a skeletal mesh, it outputs an import error of AnimationModifierLibrary when the editor is launched. The project module and the AnimationModifierLibrary mo ...
FCableSceneProxy::BuildCableMesh thrashes memory allocator
UE - Simulation - Physics - Feb 12, 2025FCableSceneProxy::BuildCableMesh in CableComponent.cpp:233 showed up as a hot spot in profiling because the two TArray allocators in SetDynamicData_RenderThread used by BuildCableMesh are created an ...
Incorrect mesh deformation when Max World Position Offset Displacement used
UE - Graphics Features - Nanite - Feb 12, 2025When Vertex Animated Texture is used to animate a mesh with World Position Offset, often the Max World Position Offset Displacement Material setting must be increased or the Bounds Scale increased, ...
Ambient occlusion causing ghosting for animations when viewport is resized on DX11
UE - Graphics Features - Feb 10, 2025Tested regression against //UE5/Release-5.4 @ CL35576357 and the issue did not occur. This is a confirmed regression.[Image Removed] Jira Bot attaches conversation thread from Slack [Image Removed]D ...
DMX component in world partitioned level fails cook
UE - Virtual Production - IO - DMX - Feb 10, 2025Since UE5.5, RegisterComponent has been called during cook process, So unnecessarily references from DMXLibrary to DMXComponent has been added. There is a workaround to avoid adding references : ...
[AI] Navigation System can be constructed in situations where the NavigationObjectRepository subsystem is not valid
UE - AI - Navigation - Feb 7, 2025Investigate and fix all calls where the Navigation System is constructed without the NavigationObjectRepository subsystem being valid. ...
[AI] "LogNavigation: Warning: UNavigationObjectRepository is required for navigation system operations" when cooking a project with validation enabled
UE - AI - Navigation - Feb 7, 2025The cook completes with a warning for "LogNavigation: Warning: UNavigationObjectRepository is required for navigation system operations" which causes many CI pipelines to fail as they use treat warn ...
[Interchange] Crash on asset re-import
UE - Editor - Content Pipeline - Import and Export - Feb 7, 2025We've started seeing a crash in editor when re-importing one of our assets. <pre class="ql-syntax">Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 783] Array index out of ...