This is a tutorial on how to do a set extension, and place mountains in the background of your video. It covers, motion tracking, color correction, masking, color keying, and sky replacement techniques, as well as other tools useful to After Effects CS6. Please like the video, and subscribe! Follow me on Facebook: www.facebook.com/mathewscinemaproduction Twitter: twitter.com/Chris_Mathews41 Thanks for Watching and Consider Subscribing!