<Things to prepare>
1. The camera which has a mode of manual-focus.
2. Image processing software that has “Focus Stacking” tool.
ex; Photoshop , Helicon Focus, → see http://en.wikipedia.org/wiki/Focus_stacking

<Processes>
1.Choose suitable picture as background which you like, landscape or sky, etc.
2.Print out the picture to A4 paper. (photo-grade paper is not good because it reflects light)
3.Place your model, base and background together to make a scene from a viewpoint where you like.
4.Place your camera to tripod not to move.
5.Switch the mode to manual-focus, take multiple photos by varying focus area, from most frontal area to background picture.
6.Transfer the images to your PC, then start the image processing tool.
7.Try processing until you get desired result. (Actual process varies by software you choose)
Probably background can be real scape or sky, worth to be challenged.
I use Helicon Focus. Bit expensive but functions well.
http://www.heliconsoft.com/heliconfocus.html
My camera is Ricoh GX-100
I hope you get nice pics

↓The last F-104's background is digital data. Aircraft is taken by focus stacking.

