This is a simple cube with sides one unit long, textured so that the image is repeated on each of the six faces. As it stands, a cube isn’t really a very common object in most games but when scaled, it is very useful for walls, posts, boxes, steps and other similar items. It is also a handy placeholder object for programmers to use during development when a finished model is not yet available. For example, a car body can be crudely modelled using an elongated box of roughly the right dimensions. Although this is not suitable for the finished game, it is fine as a simple representative object for testing the car’s control code. Since a cube’s edges are one unit in length, you can check the proportions of a mesh imported into the scene by adding a cube close by and comparing the sizes.