For best viewing go Widescreen.
Render: Credits to the Manga Artist and Scanners
Time: About 6+ hours time on and off 3 weeks(was one of my unfinished work)
Brushes: Credits to Cloud brushes by blazter, HI SS Clouds 2, HI SS bokeh
Effects: Tons of Filters, layer blending (layers = 43 total) , etc.
This was frustrating to make in photoshop... considering I was constantly finding out what I wanted to make as a background. Turns out I tried a few clouds brushes and man gave me the inspiration to create a nice background needed for this piece. I've added a few color spots(colored clouds) and blended it to the color gradients while adjusting to the color tone. The last steps was to flatten the image and add light color effects to smooth out the clouds.....the text(bad at it) was the extra I added. It sounds easy to blend but man I was gonna give up on this one....enjoy everyone!
Ps The best version is the 1920x1200(resize from the original 2560x1600)and since I forgot to give a happy b-day to Angel Zakuro(I'm so late!)...here's your gift.