The background of my Avatar - Le'c Necra

Well, since im nearly done with my Avatar, I decided to make my background. I couldnt find a good background in google images because people just dont go around taking photos of rainbow forests/plains in Earth. Therefore, I got a picture of the following:

-The sky: http://images.google.com/imgres?imgurl=http://image16.webshots.com/17/4/20/15/186242015oTjJTa_fs.jpg&imgrefurl=http://rides.webshots.com/photo/1186242015057043262oTjJTa&usg=__JiNCYOKxAu9-j5KmR43HAYeHIlw=&h=960&w=1280&sz=22&hl=ko&start=1&zoom=1&itbs=1&tbnid=QYetc3vPNqyglM:&tbnh=113&tbnw=150&prev=/images%3Fq%3Done%2Bpiece%2Bof%2Bcloud%2Bsky%26hl%3Dko%26gbv%3D2%26tbs%3Disch:1,isz:l&ei=RY2ETe26DYfEvgPG3unHCA

-A cloud:
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjD6yp-MyHIki5lSJ1WhzWnLD47DslLrsKY3ylF5w0kuA2sJm54wYCnrx8G-y6bLAyg86QlaBBSGX22J3NAKyplVUFxRHqDvc6om29w8OgETqsOZ1uJXmJu7W4QqBJ3B84b9JaFklooGzgZ/s1600/clouds-chm8.jpg

-A tree trunk:
http://www.fotoartglamour.com/pictures/tree-trunk.JPG

anddd -a bush:

http://www.conifers.co.nz/chamaecyparis/cham%20ob%20tempelhof.jpg

Then I put them in one new window as different layers. I coloured them using masking+hue/sat

Here's my finished background: