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Stephen0523
02-20-2009, 06:43 AM
Hi. I was looking for any tips on exporting a LW object for printing on a 20 foot x 50 foot digital print.
What are the est settings to give optimal resolution/dpi (dots per inch)?

Nangleator
02-20-2009, 07:04 AM
That's a tricky question. For tradeshow graphics I've done, 100dpi works when the audience gets no closer than 6 ft. or so. I've used 75dpi and even 50dpi for hanging banners that people don't get closer to than 15 - 20 ft.

But a 50'x20' banner @ 50 dpi is 30,000 x 12,000. Ouch!

One trick I've used for the larger files is to render at half of the final output and upres in PhotoShop. For crisp, clean CG images, this works pretty well.

Stephen0523
02-20-2009, 07:21 AM
Thanks I will give that a try.
I am noticing the "jaggies" even with Antialiasing set to Maximum.
See attached.

Nangleator
02-20-2009, 08:39 AM
I'm not sure where the jaggies are coming from. Your LW render or the PS uprezzing?

Stephen0523
02-20-2009, 08:50 AM
I turned on Adaptive Sampling, increased the Antialiasing to Extreme Enhance and made the model 4 times the size and voila! Razor sharp with a small bit of sharpen in PS

rezman
02-20-2009, 10:27 AM
Most companies nowadays expect 300dpi even at such large sizes. Lower rezzed up images will work, but they won't look as good. I say give them the max they can print. :)

JeffrySG
02-20-2009, 10:37 AM
Most companies nowadays expect 300dpi even at such large sizes. Lower rezzed up images will work, but they won't look as good. I say give them the max they can print. :)

I have worked in the large format printing industry for over 10 years and we never ever ever want 300ppi files. It's a waste at sizes like 5 or 10 feet and a complete waste at 50ft.

It's best to always check with the output provider for the best specs.

Mr_Bester
02-20-2009, 10:58 AM
Most companies nowadays expect 300dpi even at such large sizes. Lower rezzed up images will work, but they won't look as good. I say give them the max they can print. :)

We expect 150dpi @ final size for images up to 20ft x 20ft, but that is for trade shows and lobby displays. Most of the "giant" images we have had to deal with, they want 20-30 dpi @ final size(for billboards). It's best to check with whoever will be doing the printing, they will tell you exactly what they need.

Nangleator
02-20-2009, 11:12 AM
300 dpi... talk about a little knowledge being dangerous...

180,000 pixels x 72,000. Maybe I did the math wrong, but that looks like a 289 gigabyte file.

Stephen0523
02-20-2009, 01:02 PM
I got it a good quality at 50 dpi full size.

Stephen0523
02-20-2009, 01:04 PM
Oh. I forgot to ask... does anyone have any preference to the Camera Resolution IE; 35mm Academy, 35mm Vista Vision etc?

JeffrySG
02-20-2009, 01:13 PM
Those just control the pixel dimensions and the pixel aspect ratio. They probably wouldn't have a setting for what you are doing.

Stephen0523
02-20-2009, 01:15 PM
Strange, because when I choose different setting there is a dramatic improvement in the output quality and file size.

JeffrySG
02-20-2009, 11:05 PM
Well, those settings do change the output pixel dimensions - that would effect the size of the file produced. But you can simply type in any pixel dimension you need.

Nangleator
02-21-2009, 09:55 AM
There's no preset for 50' x 20'!