Can Nano Banana 2 Upscale Images? My Enlarge vs Re-Detail Rules

People ask can nano banana 2 upscale images expecting a magic 4× button. What I get on Generate is stronger re-detailing—great for soft AI exports, risky for forensic pixel fidelity.

TL;DR

Situation	My call
Soft AI art → sharper hero	Nano Banana 2 enhance
Print-proof photo enlarge	Dedicated upscaler
Identity-critical face	Lock “do not change identity”
Edit then enlarge	Compose first, enhance last

Prompt I use

Upscale and enhance. Recover fine texture, keep composition and identity identical, reduce compression artifacts, natural detail, no plastic oversharpening. Do not add objects, text, or logos.

Soft CTA

Enhance on Generate. Soft thumbs from the YouTube thumbnails flow often need this second pass.

FAQ

True 4K from 512px? A detailed interpretation, not a perfect optical enlarge.
Before or after edits? After composition is locked.