Hello, I finally managed to organize the page on the server, http://plouffe.fr/piat1000billion/index.html there are 10000 images of 10000x10000 in one single page. one trick : you can use the mouse to zoom out the whole page with the 'CTRL' key and the 'roulette'. any patterns ? : not so far. this combined image has 1000 billion pixels. Best regards, Simon Plouffe