Hi Jnerf,

Read this thread:
http://www.talkgraphics.com/showthre...ht=#post209027

i made this design to print in a banner of 20 feet by four feet.

It required to be exported as a 60 inch by 12 inch (aprox.)
at 300 dpi in tiff file format. (150 MB)

That tiff image was downsampled to 72 dpi
and scaled to 20 feet by 49.5 inches.

Although, I do not have a photo, some years ago
I created a banner with the dimensions of a two story
building using the same method.