software i used. Rasterbator
"The Rasterbator creates huge, rasterized images from any picture.
Upload an image, print the resulting multi-page pdf file and assemble
the pages into extremely cool looking poster up to 20 meters in size. "
Anyone else done some?
Are you a mind-reader, annide? I was looking for this Rasterbator thing just the other day!
Old school
Banging,
Handy tool this, thanks for the link.
I found a picture of a load of cassettes on Flickr and made this:
Lovely cassettes! 
I’ve printed out a picture of black-hat guy from XKCD on 10 sheets of paper… he will stand 4.5 feet high in my office window, facing outward, for all the passing university students to see 
Damn, I’ve been looking for something like this for a long time. I couldn’t be bothered to cut and print the pictures I made myself so I just drew them again with the screen next to the paper, which was fun but took lots of time. Thanks.
On a side note, 
“homokaasu” (=homo-/gay gas)