In the following tutorial from GFX Buddy, he will show you the process for making the “Portal Spheres“. The tutorial is a long one.
He will begin by showing you how you can model the entire scene. He will then show you how to use the Emitter, the Dynamics and how you can achieve the flicker effect. He will finish the tutorial by showing you the Compositing in After Effects.
Making an “Portal Spheres” Animation in Cinema 4d