
All the models and the final render are done in Blender 3D, and all the textures are svg files made in Inkscape (so that is all the colours in the entire scene except for the vertical gradient in the sky)
You can find the experimental version of Blender (and info about it) that can use svg textures here: http://blenderartists.org/forum/showthread.php?t=160370

You can download a bigger version of the image here: http://misc.macouno.com/runboy-wallpaper.jpg