A few months ago, i heard of a website that helped you create the distinctive tilt shift miniature effect on ordinary images. Tilt shift can be achieved using lenses or large format cameras like monorail 5x4, and is often used in architectural photography for correcting perspectives. The lenses/large format technique can also have a lot of creative photography uses too.
The website is easy to use and lots of fun. Just make sure the photographs you upload aren't too big - image sizes of around 1024 x 768 are a good size to start with. A bit of time experimenting is often required and, as the tilt shift maker website comments, the choice of image needs to be right to get the best results:-
As you move to the top of the photo, the distance of objects in the photo should gradually become further away. For this reason, photos taken looking down at an angle to a scene often make good tilt-shift miniatures, because they have a good mix of objects at different distances. We want to give the illusion of focusing the camera at a very specific distance, so having good depth in the photo is important.
The Tilt Shift Maker website can be found at:- http://tiltshiftmaker.com/