Brushing up on VFX in Niagara by trying to achieve a pretty simple, specific effect: The transporter activation in Next Generation. Made a simple star sprite, and iterated through a lot of Niagara's basic functions to get it to a place I'm happy with.
In-engine, displayed in a quick mock-up of the Star Trek TNG transporter pads that I built in Maya. The effect just didn't look right without it.