Unreal Engine Issues
Unreal Engine Issues
BlackboardComponent observer can be called for the wrong key
UE - AI - BehaviorTree - Feb 7, 2023We need to, at least, prevent this by clearing observers when running a new BT using a different blackboard. Must also think that this might affect licensees relying on the current behavior (might h ...
Request for 'Switch on Int' nodes to throw a warning or auto refresh if an execute pin is removed
UE - Gameplay - Blueprint - Nov 17, 2016Request for 'Switch on Int' nodes to throw a warning or auto refresh if an execute pin is removed. For example: If the 0 pin is deleted, users may not realize the pins will reset back to (0,1,2,3,e ...
Ensure condition failed : loading sublevels containing reflection captures, UpdateAllReflectionCaptures may be called twice
UE - Graphics Features - Apr 1, 2021If sublevels containing multiple reflection captures are loaded in consecutive ticks and the execution timing of UpdateMaxCubemaps on rendering thread is delayed, UpdateAllReflectionCaptures will be ...
FBX & OBJ Files no longer Import with their UVs Depending on Software Used
UE - Editor - Content Pipeline - Import and Export - Sep 6, 2016Importing an OBJ file no longer imports the UVs. Test asset included for OBJ and FBX version of the same file. Added Test FBX from SketchUp Tested with: 4.12.5 CL-3039270 - Working 4.13.0 CL-31 ...
When switching versions of UE4 the folder colors do not migrate with the project
Tools - Feb 27, 2015User reports when creating a project and changing the folder colors in 4.6, then opening the project in 4.7/4.7.1, the folders go back to their default color. Users have also reported this happenin ...
Premature prompt with failed import when Importing LOD Level for Skeletal Mesh
UE - Editor - Content Pipeline - Import and Export - Apr 7, 2016When importing a LOD Level for Skeletal Meshes, the user is greeted with a windows directory window and a message that states "Failed to import mesh for LOD level 1" As the user states, this is a s ...
NaN Present on IOS after UE5.6 Because of Removal of MobileSpecularGGX
UE - Platform - Mobile - Sep 24, 2025In UE5.6 MobileSpecularGGX was removed and now mobile devices also run D_GGX. The problem is that there are still cases where very bright values are produced (image 1) and thus NaNs appear in the Bl ...
Increment / Decrement nodes do not call BlueprintSetter functions
UE - Gameplay - Blueprint - Oct 31, 2017When BlueprintGetter / BlueprintSetter specifiers are used for a property, the increment/decrement nodes in blueprints will call the BluprintGetter function but not the BlueprintSetter function. Th ...
UE 5.4 - Specular/reflection disappears above 4096 resolution render
UE - Rendering Architecture - Aug 1, 2024After a viewport is more than 4096 pixels wide, Lumen's specular reflections buffer cuts its width off at 4096 pixels. It appears that the affected buffer is "Lumen.Reflections.ResolvedSpecularIndi ...
"Allow Custom Depth Writes" Creates Artifacts In Depth Buffer
UE - Graphics Features - Jan 5, 2017When a transparent material has "Allow Custom Depth Writes" enabled it is prone to have artifacts in the custom depth buffer under specific conditions. The conditions are as follows:The translucent ...