I used a couple tutorials to make this image. I followed along this one : https://www.youtube.com/watch?v=yzXU6Erwfo8 for the robot and used parts of BlenderGuru’s tutorial on clouds : https://www.youtube.com/watch?v=TJ_OcBh7F5I. Thanks to both of them
Better resolution here : http://i.imgur.com/GivTX9t.jpg