Which AI upscaler gives the cleanest result for a 24 by 36 inch poster print?
Different families of upscalers behave differently. Some are trained to restore and sharpen, some regenerate detail with a diffusion model, and the second kind can invent texture, which is probably your fake little textures. For poster work I would use a conservative one and avoid creative or high-strength settings.
Cite
Creatisimo, "Which AI upscaler gives the cleanest result for a 24 by 36 inch poster print?", https://creatisimo.net/topic/which-ai-upscaler-gives-the-cleanest-result-for-a-24-by-36-inch-poster/, accessed 2026-11-03.I run a small print shop and more and more customers walk in with AI generated art on a phone or a USB stick, usually around 1024 by 1536 pixels, and want it printed as a 24 by 36 inch poster. At my printer's preferred 300 pixels per inch that would be about 7200 by 10800 pixels, so there is a big gap.
I have been running their files through a few different upscalers to see what happens. The results are all over the place. One makes skin look like wax. Another turns small text on a sign into soft mush. A third adds fake little textures that were not in the original. The prints are the part customers actually judge.
Is there an upscaler that handles this best, or is it really about the settings and the source file? Do I upscale in one big jump or in steps? And what should I tell customers up front about what a 24 by 36 can look like from a file this small?
2 more replies
Most helpful first- Ezra M.Member ·
Different families of upscalers behave differently. Some are trained to restore and sharpen, some regenerate detail with a diffusion model, and the second kind can invent texture, which is probably your fake little textures. For poster work I would use a conservative one and avoid creative or high-strength settings. Also upscale to a size you can check at 100 percent zoom before you commit.
- Arlo P.Member ·
From the client sign-off side: print a proof strip before the full poster. Pick a face, a piece of text and a flat color area from the file, print just that strip at final size, and have the customer approve it. It costs far less than a wrong poster and ends the "that is not what I expected" conversation.
Write something first.
Give people something to work with: at least 30 words on what happened and what you tried.
That is too long. Keep it under 6,000 characters.
Write the question as the title, 15 to 140 characters, no links.
Pick a category.
Add a name (2 to 40 characters, no links).
That email address does not look right.
That was quick. Read the thread, then try again.
The form expired. Reload the page and post again.
Something went wrong with the form. Reload and try again.
Please complete the check and post again.
Limit reached for now. Try again later.
This thread is closed to new replies.
This thread no longer accepts replies.
Something went wrong with the form. Reload and try again.
Post a reply or question first (name and email), then this browser can vote, edit and accept answers.
You cannot vote on your own post.
Only the author (within 30 days) or the forum team can do that.
That email already has an account. Use your sign-in link instead.
New accounts are paused for the moment. Try again later.
That was already posted.