This is matte-painting done for a independant movie from Canada called "Cercle Vicieux" ake "Vicious Circle" from Scylla Films.
This Matte Painting was done with a very large width to give the opportunity to use the same image for at least 10 shots.
The resolution of my PSD file of work is around 6000 pixels width. I did everything in Photoshop CS. I mostly used photos that I took when I did the trekking of the Jbel Toubkal Mountain in south of Marocco last year.