9m wide wall image - what is the best export size and format ?

mikeyw

mikeyw

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Hi,

A client is using one of my images for a feature wall that's 9m wide.

The original file is a 6000x4000 raw file.

What format should i create as an export to retain the best possible quality and if i scale up higher than 6000x4000 with Lightroom start to lose quality ?

tia,
Mike.
 
That'll be fine. I'd just export it at 100% quality, full size.
I once had an image taken with a 300D on a 7 story high video wall. It looked great [emoji3]
 
I don't think you'd need to scale it up at all. Pixel count doesn't directly correlate to printed image size, it depends what DPI the file is being printed at. For a nine metre wide image I'd think it was going to be viewed from a fairly long way away so it will be printed at a low DPI
 
I see Lightroom is meant to upscale pretty well, would it not be worth trying 12000x8000 ?
 
It's actually a wall behind a reception in a business so safe to say viewing distance between 3ft to 6ft
 
Bizarrely the printers/signmakers are asking my advice here Dave !
 
RichardC27 said:
I don't think you'd need to scale it up at all. Pixel count doesn't directly correlate to printed image size, it depends what DPI the file is being printed at. For a nine metre wide image I'd think it was going to be viewed from a fairly long way away so it will be printed at a low DPI
Click to expand...
Darn... it is PPI not DPI, images have pixels not dots... apart from that this is correct... chances are that if an image is being printed at that sort of size then they will be using a Raster Image Processor (RIP) that will handle any scaling of the image, simply send the file in its original size.
 
mikeyw said:
Bizarrely the printers/signmakers are asking my advice here Dave !
Click to expand...

If they know not what they require they sound like they fall into the "all the gear & no idea...." camp of companies. IMO passing the buck to you only means one thing....if it goes wrong they can blame you when it comes to explaining to your client why the image looks like it does and not how your client wanted/expected it to look like !!!

You can get a trial of AI Gigapixel if that would help you but I still fear that you could dig a hole for yourself if you are not careful.
 
mikeyw said:
Bizarrely the printers/signmakers are asking my advice here Dave !
Click to expand...


As BoxBrownie has said, the printers want you to make a decision so if it goes ^^, they'll still get paid. I'd just give them the largest file you have without upscaling and let their machines deal with sorting out resolution etc..

9m is 354 inches (give or take!) so your 6000 pixel long edge will give a resolution of 16 ppi.
 
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