In this tutorial we'll create an atom simulation using Particular, CC Sphere, a few layers along with some tricks and smoke screens. In order to make this scene a true (AE) 3D scene we will use some expressions and AE tricks to make the 2d layers act as 3D layers, and respond to the camera. This scene is quite simple and straight forward. But it is compiled out of lots of small steps. We got a lot to do, so let's get started.