For the Stellaris DLC Overlord we added some new megastructure, and one of the biggest one was the Quantum Catapult where I got the opportunity to do quite a lot of big effects on it. With different effects for every stage to show that the higher tier you get the more stable and controlled the structure becomes.
Art direction by: https://www.artstation.com/simongunnarsson
Concepts made by: https://www.artstation.com/obhi
3D model made by: https://www.artstation.com/timwiberg