Unreal Engine Issues
Unreal Engine Issues
Crash at compile time when using a VariableSet node with a local variable created by pasting a private property
UE - Framework - Blueprint - Oct 7, 2025When a property is created in this way, a local variable with a Private flag is generated. Since such a variable is generally not desirable, it would be better to remove the Private flag upon pastin ...
Importing a Mesh with a Translucent Material from Max or Maya ignores opacity
Tools - May 22, 2015When you import a Mesh with the import Materials / Import Textures checked ture from Max or Maya that has Opacity or an Opacity Mask set up on the model's material, the opacity settings and ignored ...
Static code functions cause associated blueprints to not compile after a hot reload
UE - Foundation - Cpp Tools - Hot Reload - Oct 14, 2016If a function inside a BlueprintFunctionLibrary class is declared as static, instances of the function node inside blueprints cause the blueprint to not save after a hot reload. This does not affec ...
Second Animation Sample added to AimOffset or Blendspace swaps with the first sample
OLD - Anim - Oct 3, 2016Second Animation Sample added to AimOffset or Blendspace swaps with the first sample Note: After adding a 3rd sample, they switch back to the correct position. Regression: Sort of. In previous ...
FBXImportAsset Data is lost on project restart when changing any Build Settings
UE - Editor - Content Pipeline - Import and Export - Jul 27, 2015After importing a Static Mesh, if you alter any build settings and apply changes, on the next opening of the Project you will not be able to reimport the asset changed. You will have to retarget th ...
Subclass disappears from class variable drop-down on re-open
UE - Gameplay - Blueprint - Mar 13, 2017Subclass disappears from class variable drop-down upon reopening the project. There is a workaround for the issue but it is strange in nature. Opening the level blueprint and adding the node in scre ...
Construction script not updating HISM array count
UE - Gameplay - Blueprint - Mar 27, 2017Construction script not updating HISM array count, even when new elements are adding inside of the level. Regression: Issue occurs in 4.15.1 of the binary build Using the same repro steps provid ...
Crash When Using Kill Box/Kill Height With Ribbon Emitter
UE - Niagara - Mar 29, 2017Ribbon type particles seem to crash the engine if they enter a killbox. This reproduces 8/10 times on the first attempt, you may need to play with the kill box placement (left corner and right corne ...
Black artifacts when navigating viewport
UE - Graphics Features - Apr 18, 2017When navigating the viewport, placed actors can leave a "black shadow" as the camera viewpoint changes. The artifacting remains until "Game view" or wireframe mode is activated. This only occurs i ...
Alt tabbing into the Blueprint Editor while a Microsoft IME keyboard is active causes the editor to freeze
Tools - May 15, 2017If you change focus to the Blueprint Editor (Alt+tab) while a Microsoft IME keyboard is active, the editor will freeze for a short time. The duration of the freeze is dependent on the number of blue ...