3D art and animation is a very in-depth topic. We could go on ad nauseam about materials, shaders, lighting, sculpting, PVR textures, and all of the topics of what makes great 3D objects for games, movies, architecture, or any other 3D object-based application.
Some of the details of these topics are beyond the scope of this book, so for now, let's keep things simple.
Let's work with the default SceneKit scene and objects that Xcode gives us as a start, as shown in the preceding image:
As of the time of writing this book, we used the SceneKit template for Xcode 7 – Beta. Based on the version you use, ...