FMargin CullingBoundsExtension
Can be used to enlarge the culling bounds of this widget (pre-intersection), this can be useful if you've got children that you know are using rendering transforms to render outside their standard bounds, if that happens it's possible the parent might be culled before the descendant widget is entirely off screen. For those cases, you should extend the bounds of the culling area to add a bit more slack to how culling is performed to this panel.