In this mission, we learned how to create a globe and how to use GLSL shaders as filters in Processing. We have only scratched the surface of what is possible with shaders using a modern graphics card; there is so much more that can be done with a globe besides making it rotate and look awesome. Why don't you try one of the following ideas to extend the sketch we have just created:
Create a "sun" that lights up the globe correctly based on the time of day, and use a GLSL filter that uses the day and night texture images and blends between the two at the day-night border.
NASA provides satellite images for the various planets and moons of our solar system to download for free. Why not make a whole solar system?
Create a different set of GLSL filters to recreate the hand-drawn black and white globes from the weekly newsreels in the cinemas of the 50s.