Mordor Panorama WIP

First three steps of working on a Panoramic Skybox of Mordor.
It will eventually be behind an interactive version of this:
The secret of the in-between steps is a dose of Bacon magic.
 In less vague terms, I’m playing with doing most of the painting on a grey-scale layer while coloring on a series of overlay layers. I’ve used this technique once before, safety not guaranteed.
This is a pro-bono project for a friend at Rochester institute of Technology