Can I upscale a web image for a 24x36 poster?

Sometimes. AI can improve many files, but very small sources may still show limitations.

Do I need 300 DPI for all posters?

Not always. Large posters can print well at lower effective DPI depending on viewing distance.

Tiny text and heavy JPEG damage are common failure points; inspect those first.

Upscale images to poster size with better edge definition and less visible pixelation in large-format output.

Poster workflows magnify every defect: compression blocks, blur, and jagged lines become obvious at close range.

Use SR x4 as the default for poster targets. Pair with Denoise first when the source has visible grain.

Poster quality should be judged at intended viewing distance. Minor imperfections are acceptable when seen from several feet away.