Outline, fill, background, 3D. Final touch with Highlights! 15 minutes later, train rolls out. NILS MÜLLER has been photographing various railway systems; including Berlin, Paris, Hamburg, London, Milan, Stockholm. Neither imprisonment or fines can deter him from this important part of his life - documenting the train movement! The pictures show the people behind the subculture of trainwriting. Images that convey feelings and that graffiti is more than an indiscriminate concept, but a deliberate, planned action, characterised by friendship and passion.