Tilt-Shift Instructions for GIMP

Found this very helpful instruction of Bart Busschots to simulate tilt shift pictures by using GIMP:

http://www.bartbusschots.ie/blog/?p=774

Found a similar description in German on Fothema.de:

http://www.fothema.de/2008/07/09/tiltshift-mit-gimp/

Tilt shift experiments

I found some hints in the net how it's possible to simulate tilt shift lenses. Made some tries with Gimp.