Comments
In this scene, I used bump mapping for the plantes. therefore, you could see some bump feature on the mars and earth. I also used the spot light in the scene so that you could see some cone like lightning area. Besides, I used the glass sphere with refraction index of 1.5 to distor the ray behind the glass sphere. Since it is refraction only, therefore you could see the mars and earth are kind of upside down in the glass sphere instead of corresponding to the real position(reflection). After generating a series of pgn files from the ray file, a video was made combined with the BGM of the movie 2001 space Odyssey
If you can't see the video, download it here or view a static rendering here.