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My .psd file has a resolution of 6m x 3m @ 150 DPI. This makes it 35433px x 5906px in size. Photoshop CS6 saves the file as .tiff or .psb only. When I first import into Illustrator I get an error that the file is not readable but I have tried many options. Last one is not supported by AI.

So I'm puzzled... is there a way to link large images into Illustrator?

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Why such a large image? –  Scott Oct 12 '13 at 23:16
because the printer is printing at 300 DPI and customer want to have good quality. Also the pictures allow me to have 150DPI. –  Michael Oct 13 '13 at 8:13
Are you certain items of that size are printed at 300dpi? Most oversized pieces are printed at a much smaller dpi. You should be able to work at 3'x1.5' at 300ppi and then print at 200% to achieve a 6x3' at 150dpi banner. (Or even smaller with a larger output scale). I've created many banners and billboards and have never worked at full size and full resolution. –  Scott Oct 13 '13 at 8:25
Well, AI file is of course not full size and it's like 10% of real size, because it's vector. The printing company is in china and they claim they are printing at 300 DPI. It's a billboard. Do you have any reference printer model of average printing so I can check the specs? I am just not sure how to search this kind of equipment. –  Michael Oct 13 '13 at 8:37
Vector content has no resolution. There is no ppi for anything which is vector. –  Scott Oct 13 '13 at 9:02
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