Unreal Engine Issues
Unreal Engine Issues
Crash on play if a BP uses a ClearInstances node followed by an AddInstance node
UE - Graphics Features - Jul 21, 2017Crash on play if a BP manipulates a InstancedStaticMeshComponent by using a ClearInstances node followed by an AddInstance node. This is a blocker for the licensee. This is a regression: Working ...
Map placed actor binding to another actor's Event Dispatcher (multicast delegate) results in duplicate bindings after blueprint recompile
UE - Framework - Blueprint - Apr 17, 2025Context Blueprint actors placed on the map can bind to another actor's event. If an ActorB has a reference to ActorA, it can bind to an event dispatcher in A by creating an event node in ActorB's e ...
The light in the Blueprint Editor's Preview Scene does not respond to any lighting channel but 0.
UE - Framework - Blueprint Editor - Jun 28, 2024In the Blueprint Editor, Primitive Components can be configured to respond to Lighting Channels 0, 1, and/or 2. However, if channel 0 is disabled (even with another one enabled), the Preview Actor's ...
Using a FormatText node with Specifier in the same graph as an empty Macro will freeze the editor
UE - Gameplay - Blueprint - Jun 17, 2016Using a FormatText node with Specifier in the same graph as an empty Macro will freeze the editor. Not using the Specifier or deleting the unused Marco will allow the BP to compile fine. **Only rep ...
Surface Profile Skin shading has some unexpected stripe rendering issues
UE - Graphics Features - Apr 3, 2018So it looks like the artifact is definitely related to whether sss checkboard is enabled, but I can't reproduce it if enabling checkboard right after open the map, I mean it has to be reproduced aft ...
Multiple Materials not assigned to Mesh on Import
UE - Editor - Content Pipeline - Import and Export - Jan 6, 2017Not all material elements are created and assigned to the static mesh using multiple materials. With the attached mesh, only the first element is created and the other two are left non-existent. I c ...
Fracture Mode > "Remove-On-Break" setting: Cluster Crumbling causes flickering
UE - Simulation - Physics - Destruction - May 10, 2025Fracture Mode > "Remove-On-Break" setting: Cluster Crumbling causes flickering. Once the Remove-On-Break Cluster Crumbling effect is activated, there is a small delay between the disappearance of th ...
Crash when resizing window using Quad Stereo Buffer
UE - Virtual Production - nDisplay - Oct 2, 2019We noticed crashes in our application when we attempted to resize a window or switch to full-screen mode. Hence, resizing windows and switching to full screen will result in a crash on Unreal Engine ...
Player Character does not collide with landscape
UE - LD & Modeling - Terrain - Landscape - Mar 8, 2015UPDATE: 3/9/2015 Additional Information: User on thread https://answers.unrealengine.com/questions/186928/landscape-collison-issues-recreatelandscapecollisi.html reported workaround did not fix e ...
LayeredBlendPerBone without BlendRootMotionBasedOnRootBone exaggerates root motion
UE - Anim - Runtime - May 27, 2023When BlendRootMotionBasedOnRootBone is false, the LayeredBlendPerBone is aggregating root motion of the child poses ontop of the base pose root motion. (ie. if the first child pose's blend weight i ...