How the hell was that made!?

hi, i just got an link from a friend…

www.evolutionzero.de

if you scroll down and hit the “flame” there is a colage done on a book… now my question is… how did the guy made this great background and that dirt!?

i totaly felt in love with that kind of art and i would love it to try it myself…

and what do you think about this kinda art… i never saw such a thing before…

there is no contactinformation on this site, so im completely :-?