Unreal Engine Issues
Unreal Engine Issues
Tick fires in PlayerController BP in Editor
UE - Gameplay - Blueprint - Oct 6, 2016If a blueprint has any functionality on tick, the tick event will fire when a blueprint is restored within the editor after closing and reopening a project. Regression (no) issue (does) occur in 4 ...
Crash Occurs While Running EQS Using Add Generated Vector Node
UE - AI - Sep 8, 2016A crash is occurring when running a custom EQS generator that returns a Point and uses the Add Generated Vector node. This is a regression. No crash occurs with the same setup in 4.12.5. ...
Scale with Width on Landscape Splines offsets plane mesh on Z axis
UE - LD & Modeling - Terrain - Landscape - Apr 22, 2015If "Scale with Width" is set on a landscape spline with a plane mesh, the plane will offset on the Z axis. In most other cases, scaling along the z axis does not affect planes. ...
Imported animation has one more frame than the original fbx
OLD - Anim - Jul 19, 2016In UE4.12, imported animation has one more frame than the expected frame number. AS_AN_StepAnim_Test.fbx is 60 frame long animation(starts at frame 0, ends at frame 60). When imported to UE4.12, it ...
Particle Ribbons not firing off consistently
UE - Graphics Features - Apr 8, 2016Ribbon trails do not immediately follow the lead particle when fired. There is an inconsistent delay in some that cause them to either not fire or fire mid stream. This did not occur in 4.10.4, bu ...
Material functions should be able to output the same data as it can accept as inputs
UE - Rendering - Architecture - Materials - Sep 30, 2024Material Functions cannot output Texture Objects or Booleans. This seems to be because the Material Editor believes that the outputs are Floats, and forbid connections to inputs that take Textures ...
[AI] SmartObjectPersistentCollection produces errors during Map Validation
zComponent - Archive - Nov 18, 2025SmartObjectPersistentCollection in 5.6 and later now give errors when the map validator runs due to referencing spatially loaded actors. This was working per licensee in 5.5. There was a change from ...
Uniform Scale has no effect on .fbx's imported with "Transform Vertex to Absolute" unchecked
UE - Editor - Content Pipeline - Import and Export - Oct 25, 2016Uniform Scale has no effect on .fbx's imported with "Transform Vertex to Absolute" unchecked. NOTE: This was tested with assets from both 3DS Max and Blender. Regression (no) issue (does) occur ...
Root Motion is broken in Additive Animations and causes scale issues
OLD - Anim - Jan 5, 2017Root Motion is broken in Additive Animations. Also causes scale issues Regression: YES Worked: 3039270 (4.12.5) Broken: 3172292 (4.13.2) ...
Temporal blur artifacts on Geometry Cache Components in Blueprint actor
UE - Editor - Open File Formats - Alembic - Jan 9, 2026When a Geometry Collection is in a Blueprint, attached to other components, it can render incorrect motion vectors at some angles. In the test project, any angle that is not a multiple of 45 will re ...