Unreal Engine Issues
Unreal Engine Issues
Macro Libraries do not update after rename
UE - Gameplay - Blueprint - Jan 21, 2015Macro Libraries can only be called by their original name, even after being renamed to something different. ...
Material Editor Assertion Crash When Collapsing Material Attributes
UE - Rendering - Architecture - Materials - Jul 14, 2022Collapsed material attribute nodes cause an editor assertion crash in the material editor when viewed or opened. Assertion failed: (Index >= 0) & (Index < ArrayNum): Array index out of bounds: 0 fr ...
Sequencer Conditions crash - GarbageCollectionVerification
zComponent - Archive - Apr 3, 2025Encountered a crash during the garbage collection phase when using sequencer conditions with subsequence tracks. Specifically, objects appear to break the "Disregard for GC" assumptions. ...
Optimization Viewmodes are not visible when Android Preview is enabled
UE - Platform - Mobile - Apr 11, 2019A user has reported that the Optimization Viewmodes menu does not appear with any options when the Preview Rendering Level is set to Android ES2 or ES3.1. Regression?: Yes This did not occur in 4.2 ...
Buffer Visualization for DecalMask is missing
UE - Graphics Features - Feb 29, 2016The Buffer Visualization for DecalMask is no longer an option. Also, when looking at the Buffer Visualization Overview the DecalMask slot has been removed. See attached image for comparison Worke ...
VSM shadows are missing for non-Nanite meshes in a PPV where Megalights is disabled, but Megalights is enabled in the project
UE - Rendering - Features - Jul 14, 2026In UE 5.8 r.Visibility.LocalLightPrimitiveInteraction mode 2 (enabled if MegaLights is disabled) was added and made the new default as a performance optimization. However, this causes shadows to d ...
Ray Traced Distance Field on OpenGL not working
UE - Graphics Features - Dec 1, 2015Are Ray Ttraced Distance Field Soft Shadows supported on OpenGL ES3.1 + Android Extension Pack platforms like the Shield Tablet or Shield Console? Since the ES3.1+AEP platform supports deferred ren ...
Crash After Reimporting Static Mesh With Added Material Slot
Tools - Jan 12, 2017After importing a mesh without any materials assigned, if you add a material slot and save the material. Reimporting this mesh will cause a crash. The only way to avoid this crash is to import a me ...
Disabling Grid ShowFlag also hides billboard sprites and volume outlines
UE - Rendering - Features - Nov 8, 2023The following odd behavior did not happen until UE 5.2, but happens in the latest UE 5.3. When the "Grid" show flag is disabled in the Level Editor Viewport, all billboard sprites and volume outlin ...
Missing vegetation created via PCG on export
TM - Rendering - Feb 21, 2025If you compare this 2 automation tests done on Swiss chalet project, you could see that some parts of vegetation are missing : [Link Removed] [Link Removed] The diff between the 2 exports is caus ...