Unreal Engine Issues
Unreal Engine Issues
Duplicate subobjects when you attach to an OptionalDefaultSubobject
UE - Framework - Components - Jun 3, 2022I believe that this is happening because of a problem within USubobjectDataSubsystem::FindOrCreateAttachParentForComponent where it is creating duplicates of the character mesh because the "TestScen ...
Destructible mesh loses collision and physics after packaging in 4.18.2
UE - Simulation - Physics - Destruction - Jan 17, 2018Destructible Meshes are losing collision and physics after a project has been packaged. They will work normally when running PIE. ...
Crash on attempt to clear(NullifyInstance) of duplicated Hierachial Instanced Static Mesh
Tools - May 31, 2019When creating an C++ Actor with a Hierarchical Instanced Static mesh. when duplicating such an actor with mesh instances, the instances are not visible on the level. In this state, calling HISM comp ...
Inaccurate Metal shader warning message in the Editor when CommandLineTools is set to be the default compile tool on Mac
Tools - Nov 13, 2017When CommandLineTools is set as the default tool, an inaccurate warning message is displayed when opening the Editor that states that Xcode is too old to compile Metal shaders, even if the latest ve ...
In Editor, Blueprint resources are not freed up when the Blueprint is closed
UE - Framework - Blueprint - Feb 16, 2024It appears that the preview scene used to render thumbnails is not destroyed after a thumbnail is rendered, even after the blueprint editor is closed and GC is run. Also found in Release-5.4, CL: 31 ...
After upgrading a project from 4.7 to 4.8 and compiling a blueprint that casts to and pulls a variable from a widget will cause a freeze if the widget is then compiled
UE - Gameplay - Blueprint - May 7, 2015If the user has a project that casts to a widget to pull out a variable in a 4.7 project. This can cause a freeze after upgrading the project to 4.8 preview. This happens when the user compile the b ...
Opcode shader compilation error when using a TextureSampleParameterCubeArray node with hardware ray tracing enabled
UE - Graphics Features - Ray Tracing - Mar 31, 2025Materials containing a cube array texture sampling node will not compile when hardware ray tracing is enabled. The shader compilation error indicates that an invalid op code was used: "Opcode Sample ...
Failed Import for Spline Component Error Appears on Restarting Level
UE - Gameplay - Blueprint - Jul 5, 2016When creating and declaring a Spline Component in code, placing an instance of a blueprint derived from that class in the level causes a failed import message to appear upon restarting the level. ...
Unexpected behavior occurs when the default elements of a TMap in an Actor Component are modified in an instance of a Blueprint containing that Actor Component
UE - Gameplay - Blueprint - Jan 17, 2017Adding an Actor Component that contains a TMap property to a Blueprint results in unexpected behavior when default elements of the TMap are modified in an instance of the Blueprint in the level:Addi ...
Nodes to the right of an Abort Both node in a Behavior Tree appears to still receive a tick
UE - AI - BehaviorTree - Feb 6, 2023This is a regression. Tested in //UE5/Release-5.0 CL20979098 Behavior Tree appears to tick nodes to the right of an aborted node that is set to abort Both. Those nodes are not executed, but visuall ...