Unreal Engine Issues
Unreal Engine Issues
bool variables set in code do not auto-update after a hot reload
UE - Gameplay - Blueprint - Apr 6, 2015When a bool variable is defined in code, changing the default value of the variable does not update on a hot reload This is inconsistent with other variables types that update their current value w ...
Packaging fails after changing from Dynamic to Static Nav Mesh Runtime Generation
UE - AI - Feb 8, 2016If you package with Runtime Generation set to Dynamic and then switch to Static and attempt to repackage, the packaging will fail with the following error message.[2016.02.08-16.18.14:511][217]MainF ...
When Allow Sequencer Edits Only is Enabled Some Properties Do Not Revert to Original Values
UE - Anim - Sequencer - Oct 23, 2017Certain values for the PostProcessVolume do not revert back to original values after tracks are deleted from sequencer when in Allow Sequencer Edits Only mode ...
Hypotenuse node unexpectedly returns "-nan(ind)" instead of "0.0" if both values passed into the node are "0.0"
UE - Gameplay - Blueprint - Feb 1, 2019The Hypotenuse Blueprint node currently returns a value of "-nan(ind)" if both values passed into the node are "0.0". This result is correct based on the code that the Hypotenuse node uses, but is n ...
[Spatialization] - When a sound starts playing while the listener in in the Binaural Radius, when they exit the sound stops playing
UE - Audio - Spatialization - Nov 18, 2021If a sound starts playing while the listener is inside the binarual radius, the sound stops abruptly when they leave the radius. Does not occur if the listener starts in the binaural radius. Does no ...
Inherited UserWidgets can't create animations that bind to widgets on their parent's WidgetTree
UE - Editor - UI Systems - UMG - Nov 7, 2022Animating an inherited widget from a child UserWidget class appears to work, but the bindings don't resolve properly and the animation is null at runtime. This workflow should either be supported, o ...
When a Niagara User Parameter is renamed, mesh bindings on Niagara Mesh Renderers are not updated, and the binding is silently broken
UE - Niagara - Mar 13, 2025In Niagara, Mesh Renderers expose a "Meshes" array for selecting the meshes to be rendered. On each array entry, a property "Mesh Parameter Binding" is available and allows the user to override that ...
Construction script on child actor components not respected in PIE
UE - Gameplay - Blueprint - Jan 14, 2016Child Actor Components run their construction scripts upon parent's placement in level. However, these specifications are not maintained once PIE is initiated. ...
Child actor component mesh actor does not update transform with child actor component in parent blueprint
UE - Gameplay - Oct 22, 2015if a child actor component is set to a new child actor at runtime, the actor will not update with the transform of the child actor component in the parent blueprint. ...
promoting a variable to a local variable in another blueprint creates compile error.
UE - Gameplay - Blueprint - Sep 30, 2015If a local variable set variable is copied/pasted over to a second blueprint and the input pin is promoted to a local variable, compiling the blueprint will cause a compile error to appear until the ...