Maybe it would be best to talk to a printer first. I have the experience, that most does want the master 1:10 (10 times smaller than the poster). And the software for printing does the rest. I do have some pretty good experiences with even A1 (=594x840 mm) and an image that is originally only A4 (300 dpi) big. Digitally printed. But Yves your right - i'm curious too to see the efficiency of a "fractal" program. :-) Walther

One day your ship comes in - but you're at the airport.