Unreal Engine Issues
Unreal Engine Issues
Rhino extrusions have high tessellation values after being imported with DataSmith
UE - Editor - Content Pipeline - Datasmith - Importer - Nov 28, 2018When importing Rhino 'Extrusions' with Datasmith results in extremely dense meshes. A simple box can end up having thousands of vertices. This issue was reported and tested in 4.21 (4.21E0). This ...
Project with Preferred Landscape Orientation set to Left Home Button still launches oriented Right Home Button
UE - Platform - Mobile - Oct 16, 2018Projects with Preferred Landscape Orient set to Left Home Button will still launch on iOS in Right Home Button orientation. ...
If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible
UE - Virtual Production - Tools - Jul 31, 2025If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible. The behavior only shows after d ...
When Adding Custom Bindings, get ensure that "Multiple persistent shared references detected for Sequencer..."
UE - Anim - Sequencer - Nov 17, 2025Ensure: Error LogOutputDevice Ensure condition failed: SequencerRefCount == 1 [Link Removed] [Line: 967] 1. Error LogOutputDevice Multiple persistent shared references detected f ...
MultiProcessCook Shader Symbols fail to write when two workers race and try to write them at the same time
UE - Foundation - Data Pipeline - Cooker - Jan 4, 2026When shadersymbols are requested, cooking shaders writes the symbol files into {Project} /Saved/ShaderSymbols/<PlatformName>. These symbols are written by the function FShaderSymbolExport::Write ...
World Override GameMode values do not save after project is closed and reopened
UE - Gameplay - Apr 17, 2015The gamemode settings under world override do not save once the project has been saved, closed and reopened. ...
The Ease function's Blend Exp reverts to its default value after closing/reopening the editor
UE - Gameplay - Blueprint - Jan 20, 2015The Ease function's Blend Exp reverts to its default value after closing/reopening the editor. Reproduced in 4.6.1 binary and in Main (CL-2408355). ...
Physics object set to OverlapAll will still collide with the player
UE - Gameplay - Aug 24, 2015Physics object set to OverlapAll will still collide with the player User Description: The pawn is simply colliding with and causing physics on objects it shouldn't be. To replicate: Set up a new ...
Foliage Instanced Static Meshes disappear when FISM Component BP is compiled
UE - World Creation - Worldbuilding Tools - Foliage - Nov 10, 2017This bug removes foliage from a level when the Component Blueprint is compiled. Switching the Foliage type asset to another component will cause the issue to stop occurring. The Component Blueprint ...
ServerTravel from a map with a GameMode set to Use Seamless Travel and then ServerTravel back from a map without Seamless Travel enabled will crash the editor
UE - Networking - Mar 3, 2015ServerTravel from a map with a GameMode set to Use Seamless Travel and then ServerTravel back from a map without Seamless Travel enabled will crash the editor. Reproduced in 4.7.1 binary and Main ( ...