Matt Sugden Posted April 8, 2009 Share Posted April 8, 2009 Hi I am working on a project this week and the client has asked me to render a large version of the image out for print. Essentially he wants a life size printout out of a very large TV/Wall unit cabinet of dimensions about 5m x 2.7m. I have spoken to the printer and he has requested that I produce a resolution of half 'real size' @ 300dpi. Now I have just got my calc out and estimated that by this reckoning I will need to produce an image at 2.5m x 1.35m or (1000inches x 540inches) then multiplying my 300dpi, gives me a whooping 300,000 x 162,000 pixels!!!!! Surely this can't be correct? or if it is, surely it is not necessary or practical to produce something of this kind of resolution? I'm rather worried about the technical aspects of producing such a big image, as at present a 2000x1500 pixel images is taking 2hours to render. What would you guys suggest? I'm pretty up against it time wise so any advice would be great. Link to comment Share on other sites More sharing options...
ankit4d Posted April 8, 2009 Share Posted April 8, 2009 (edited) Hi I am working on a project this week and the client has asked me to render a large version of the image out for print. Essentially he wants a life size printout out of a very large TV/Wall unit cabinet of dimensions about 5m x 2.7m. I have spoken to the printer and he has requested that I produce a resolution of half 'real size' @ 300dpi. Now I have just got my calc out and estimated that by this reckoning I will need to produce an image at 2.5m x 1.35m or (1000inches x 540inches) then multiplying my 300dpi, gives me a whooping 300,000 x 162,000 pixels!!!!! Surely this can't be correct? or if it is, surely it is not necessary or practical to produce something of this kind of resolution? I'm rather worried about the technical aspects of producing such a big image, as at present a 2000x1500 pixel images is taking 2hours to render. What would you guys suggest? I'm pretty up against it time wise so any advice would be great. If i am not wrong there is some problem with your calculation. 2.5m x 1.35m is 98.42 inches x 53.14 inch. You need to create a render of size 29526 x 15942 pixels. Edited April 8, 2009 by ankit4d problem in calculation Link to comment Share on other sites More sharing options...
Matt Sugden Posted April 8, 2009 Author Share Posted April 8, 2009 ah! yeah you're right, I got my 'mm' mixed up with my 'cm' and out by a factor of x10.... thanks... I'm such an idiot!! ha ha Link to comment Share on other sites More sharing options...
ankit4d Posted April 8, 2009 Share Posted April 8, 2009 Anytime Matt. Link to comment Share on other sites More sharing options...
vizfx Posted April 8, 2009 Share Posted April 8, 2009 The 300 dpi resolution is for materials like posters, brochures and so on. For those kind of materials a legitimate distance between them and the person who is watching is somewhere between 0,2-2m. One good example - you`ll see the difference between 150dpi and 300dpi on printed materials at a distance smaller than 0,5m. So you`ll have to think about this point of view….. the truth is you`ll need a smaller resolution probably somewhere around 100 dpi Link to comment Share on other sites More sharing options...
vizfx Posted April 8, 2009 Share Posted April 8, 2009 Another good example…. photos used on advertising banners … even with a full frame photo sensor you will have somewhere around 21-37 megapixel (37 is for KODAK KAF-37500 Image Sensor) this means aprox. 6000*4000 px. Link to comment Share on other sites More sharing options...
REDVERTEX Posted April 8, 2009 Share Posted April 8, 2009 The 300 dpi resolution is for materials like posters, brochures and so on. For those kind of materials a legitimate distance between them and the person who is watching is somewhere between 0,2-2m. One good example - you`ll see the difference between 150dpi and 300dpi on printed materials at a distance smaller than 0,5m. So you`ll have to think about this point of view….. the truth is you`ll need a smaller resolution probably somewhere around 100 dpi This is abolutely the right advice. !!! Use your dimensions and go for 100dpi !!! Link to comment Share on other sites More sharing options...
aaron-cds Posted April 8, 2009 Share Posted April 8, 2009 I have spoken to the printer and he has requested that I produce a resolution of half 'real size' @ 300dpi. You're printer is ignorant. Whenever someone doesn't know what they're talking about they always tend to say "Make it 300 dpi", because that's what they've always heard. 300 dpi is great for an 8x10 print that you would look at while holding it a foot from your face. Will your client be standing a foot from the life size print? When he does, give the back of his head a gentle nudge Link to comment Share on other sites More sharing options...
Ky Lane Posted April 8, 2009 Share Posted April 8, 2009 I recently did a 5m x 1.75m poster, and did it at 200dpi - and couldnt pick the quality difference from a bubblejet printout on photo paper. 300 is overkill for something that big. Link to comment Share on other sites More sharing options...
Mat@MDI-Digital Posted April 8, 2009 Share Posted April 8, 2009 make it 150dpi and you will be fine. The larger the printed image the less DPI you can get away with (for the most part) Link to comment Share on other sites More sharing options...
ihabkal Posted April 8, 2009 Share Posted April 8, 2009 same thing, rendered a billboard last week, 18000 pixels wide came out at 200dpi, looked awesome. 300 is overkill. Actually in Lebanon, they print this on textile with machines that have a maximum of 200dpi (maybe also 150 dpi) Link to comment Share on other sites More sharing options...
Frosty Posted April 8, 2009 Share Posted April 8, 2009 Beyond all of the above advice, I believe the tiff format has a pixel limitation on 40,000 X 40,000. I remember hitting it when trying to stitch together two sections of the blue marble image. Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted April 8, 2009 Share Posted April 8, 2009 This actually belongs in a software or render engine specific forum. I used Max and MR to render out a 25,000 pixel wide image a couple of weeks ago. Depending on what software you are using, you may find a few useful hints there. http://www.cgarchitect.com/vb/34983-backburner-hanging-very-high-res-image.html Link to comment Share on other sites More sharing options...
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