Unreal Engine Issues
Unreal Engine Issues
Attempting to Change Global Variable to Local Variable in a Function Containing a Timer Causes Compiler Error
UE - Gameplay - Blueprint - Sep 14, 2016When attempting to replace a global float variable with a local float variable that is connected to a Timer node in a blueprint function, an error will appear after trying to compile. This does not ...
Adding Elements to multiple Struct Arrays of a specific variable type is unreliable
UE - Gameplay - Blueprint - Aug 25, 2015Adding Elements to multiple Struct Arrays of variable 'Slate Brush' is unreliable. ...
Virtual Shadow Maps on Spot Lights cause a blocky presentation similar to an incorrect mip level
UE - Graphics Features - Shadows - May 26, 2025Spot Lights may present with very blocky shadow artefacts when a long attentuation radius is provided with a small cone angle. In extreme cases, this causes the VSMs to invalidate every frame. Notab ...
External reference error when trying to save Level Sequence Actor
UE - Anim - Sequencer - Feb 7, 2017External reference error when trying to save Level Sequence Actor after a change has been made. The error given is "Can't save ../../../.././../Users/YourUserName/Documents/Unreal Projects/YourProje ...
Using a user generated timeline in blueprint causes an exception in engine code.
UE - Gameplay - May 13, 2015This crash is caused by an exception that is thrown due to the functions inside of a blueprint based off a user-defined class that is suppose to mimic Timelines. ...
Selecting a bone inside of the Persona's Skeleton tab while running DX12 causes a crash
UE - Graphics Features - Dec 9, 2015When running in Dx12 on Windows 10, the editor will crash if you click on a bone that you wish to edit in the Skeleton tab of Persona ...
Incorrect values from NAND node with 3 inputs
UE - Gameplay - Blueprint - May 2, 2017The values printed from the nand boolean node display incorrect values for the specific set-ups with 3 inputs that are in the repro steps. The node works as intended with 2 inputs, and with some of ...
The AND node always calculates all inputs
UE - Gameplay - Blueprint - Nov 5, 2015The AND node always calculates all inputs, even if the first input fails as False. Probably related to [Link Removed] (currently unresolved, but a Select node-specific fix is mentioned in the comme ...
Differences in Post Process FX between Minimized and Maximized Viewport
UE - Graphics Features - Apr 19, 2016When scaling the viewport window using the Maximize/Minimize viewport option, the post processing effects applied to the screen do not scale properly. This issue seemed trivial at first, as the use ...
Niagara Scalability Crash When Processing Significance
UE - Niagara - Jun 4, 2025Method FNiagaraScalabilityManager::ProcessSignificance() iterates on indices from Context.SignificanceIndices and uses them to access the State and ManagedComponents arrays. It can then decide to cr ...