Unreal Engine Issues
Unreal Engine Issues
Sequencer - When a subsection has negative play rate, any nested sub-subsections fail to evaluate
UE - Anim - Sequencer - Jul 3, 2025Consider a sequence hierarchy with more than two layers. If the top-level sequence uses a negative timescale on a sub-sequence, the contents inside it animate as expected, but any nested sub-sequenc ...
Virtual Bone effect is lost after re-importing mesh
OLD - Anim - Dec 31, 2018After setting up a Virtual Bone on the skeleton and having it drive a Skeletal Control Node in an Animation Blueprint. Reimporting the skeletal mesh will cause the setup in the Anim BP to revert bac ...
Animation Blueprint Classes are Uncastable
OLD - Anim - Aug 13, 2019It appears that the Anim Instance class is no longer accessible. As a result, no animation blueprints made are accessible via blueprints - regardless of whether or not the skeletal mesh actually use ...
Objects animated in Sequencer fail to trigger collisions against stationary characters with character movement components
UE - Gameplay - Player Movement - Oct 22, 2024When an object, such as a cube, is animated in sequencer and that object's path intersects a stationary character with a character movement component, the object will pass through the character with ...
Crash when changing r.MaterialQualityLevel when FastGeo plugin enabled in cooked build
UE - World Creation - Worldbuilding Tools - Sep 5, 2025The engine crashes when the r.MaterialQualityLevel is changed in a cooked game that uses the FastGeo Streaming Plugin. The crash doesn't repro with the same steps in Editor, just in a cooked build. ...
GetAssetRegistry by class and subclass only works for Material data types
UE - Gameplay - Oct 16, 2018The GetAssetRegistry blueprint node only produces the asset data for the Material class and its subclasses. It completely ignores the asset data for Actor, derived Actor class Blueprints, and the su ...
[CrashReport][GPU Crash] NodeAndClusterCull
UE - Rendering - Graphics Features - Nanite - Nov 19, 2024Users affected: 51 Total occurrences: 90 Last occurrence: November 19th 2024, 3:25:41 am First occurrence: August 7th 2024, 8:10:10 pm Latest version: ++UE5+Release-5.5-CL-37670630 Platform: Win64 [ ...
Duplicating Example Level Prevents the Copy From Being Saved
Tools - Oct 27, 2015In a project, if you duplicate the example level and attempt to save it, the save will finish, but the asterisk will remain on the file. Attempting to open the duplicated map will prompt another sav ...
Performance drop when spawning AI actors during runtime compared to placing them in world
UE - AI - Jan 9, 2019There is a performance difference between spawning and placing AI into a level. This is causing issues when spawning/despawning AI actors in a large open world, where 4-5ms of frame time quickly bui ...
Volumetric Lightmaps do not work with Landscape texture mapping
UE - Graphics Features - Feb 13, 2019It appears that the Lightmass Volumetric Lightmap does not work with Landscape textures. When it samples the Landscape with some textured material, the resulting lighting build data does not match t ...