Now it's time we talk about the Scene Graph. In most game engines, there is a list of what objects need to be rendered and in order for a model or some other element to appear they need to be added to the list. Panda3D uses a similar structure, but instead of a list, we have a tree.
At the root of the tree is
render, which is created for us by
DirectStart. In order for something to appear in the Panda3D window, it needs to be attached to
render. It doesn't have to be directly attached to
render, though. If you attach element A to
render, and attach element B to element A, that's enough. That's why we refer Scene Graph as a tree.
NodePaths have a specific method used to move them around in the Scene Graph. We've already used it, ...