Unreal Engine Issues
Unreal Engine Issues
Particle emitter with Mesh Data type does not change material to new material instance
UE - Niagara - Jun 4, 2018Particle emitter with Mesh Data type does not change material to new material instance. It will not apply changes that are being made at run time to a parameter in the material instance being used. ...
CCD can produce incorrect results at low frame rates
UE - Simulation - Physics - Feb 27, 2019The attached project has a fixed frame rate of 30fps with a simulating CCD cube above a with a full restitution floor. The cube has an odd rotation, such that it impacts the floor at a single point ...
Undo and ConstructionScript break the AttachChildren array
UE - Framework - Components - Nov 14, 2019Undo fills AttachChildren array with null by the undo serializer. After that, a construction script tries to remove child components from parent component's AttachChildren but it can't find its poi ...
FInstancedStruct member uproperties are not cached when "Generate Optimized Blueprint Component Data" is enabled
UE - Framework - Blueprint - Nov 18, 2025A licensee has encountered an issue where their FInstancedStruct isn't being gathered into CachedPropertyData when "Generate Optimized Blueprint Component Data" is enabled. The changes in ...
Pilot actor no longer generates undo transactions
UE - Editor - Jan 22, 2024The piloting feature in the editor viewport is not undoable with Ctrl+Z It also does not cause the actor to become dirty so any changes during piloting are lost and not saved (user also not prompted ...
Capsule Indirect Lighting with ILCQ Volume breaks on Skeletal Meshes when making Sublevel visible not in the current Camera Frustum
UE - Graphics Features - Apr 12, 2017When using Capsule Indirect Shadows for Skeletal meshes who have their ILCQ set to Volume, and loading a SubLevel with it's actors not within the current camera's view, the indirect lighting is blac ...
Crash occurs with gameplay tag map variable compiles with default value changed
UE - Gameplay - Blueprint - Jun 28, 2017there is a crash that occurs with gameplay tag map variable compiles with default value changed. This issue occurs no matter what the secondary value of the map is. I was unable to test this issue i ...
Changing the font size to a small size distorts the font
UE - Editor - UI Systems - Slate - Nov 14, 2017There is issue occurring when changing the font size to a small size, doing this distorts the font when the size is below size 18. It is unknown if this intended behavior for how fonts are resized. ...
Rebuild (with hot reload) fails on newly-created projects
UE - Foundation - Cpp Tools - Hot Reload - Jan 18, 2018Performing a Rebuild with a hot reload on a brand new code project will fail unless both the Editor and Visual Studio have first been closed and then re-opened. The same result occurs if a Clean is ...
Full Screen Native Resolution not supported on new iPad Pro 11-inch and iPad Pro 12.9 inch (3rd generation)
UE - Platform - Mobile - Nov 16, 2018A licensee has reported that Full Screen native resolution does not work properly on the iPad Pro 11-inch and on the iPad Pro 12.9-inch (3rd generation). Black borders are used around the screen ins ...