Here is the sample process..
Make a lunarcel planet..
 
 
export the topographical map...
  
 
then take the map and apply it to a 3D Sphere and render it....
  
 
You will notice that the 3D render lacks an atmosphere but that's how the game would render them so I left that effect out.
Hope this gives you an idea on the process to make planets for se5.
Cheers! 
