 Welcome to 3D Projects in Unity with Jonathan Bradley, Head of Studios and Innovative Technologies. So a 2D project, if you were to select it, is going to create a 2D side scrolling sort of project similar to what you might have run into on old video game consoles. What we are using will be a 3D project, and this creates a true three-dimensional environment. The important distinction here is going to be how we add various components. There is a 2D version and a 3D version of many of our physics components and things that exist within Unity. For our purposes, even if we are using an object that isn't itself two-dimensional like a plane, you'll still choose the 3D physics object version because we're working in a three-dimensional environment, not a two-dimensional one.