These beautifully elaborate designs were made from photos taken by the artist, and from a version of the GNU logo which is very similar to the GNU Alternative. They make extensive use of the advanced functions of Gimp.

Here is how Stefan describes his work:

For example, I made one of my pictures (the Yellow Flower Fractal) from a design named Die Blüte der Fraktalzeit, which was made by the fractal function in Gimp. The origin of the image I used for the fractalisation is a photo I took with my smartphone, but if I tell you all the details the magic is gone. ;)  For some images, I used the mirror function of the G-Mic plugin in Gimp.

The essential meaning of sending you my work was to celebrate the art of thinking of GNU and Free Software Foundation. I'm far away from being a hacker in coding with computer language, but I'm an artist, and for me there is no difference between coding and art. Both disciplines are a kind of art for me.