Now that we have our base globe, we will look at a few options that are available to make it look better. We'll go into the three techniques in this recipe:
Adding an animated cloud layer
Adding bump mapping to give the impression of relief on the globe
Adding a skybox to fill the background skies
This recipe's starting code is the code from the previous recipe.
We will introduce a skybox. Many previously made skybox images can be downloaded from the Internet. The one that is included with the source files was found on the Unity3D forums (http://forum.unity3d.com/threads/99258-Space-Skybox), but you can also use Spacescape to create your own: http://alexcpeterson.com/portfolio/spacescape.
No matter how you obtain the skybox images, in the end you should have six images of equal size, one image for each direction. Place all the images in the lib folder of the project and give them a name so you can easily remember which is which (top,...