Fixing Garbled Korean Text in AI Ads — a 3-Step Procedure
ImageFactory Engineering · Published 2026-06-12
Garbled Korean in AI ad images isn't fixed by prompt tricks that lower the odds — it's fixed by a structure that never redraws the text. Models draw glyphs as visual patterns, and Korean's 11,172 composed syllables make stable rendering impossible to promise (the full mechanics are in our detailed report). The working procedure is three steps.
Step 1 — If you must generate text, three rules
- Keep copy to 1–3 words and put the exact phrase in quotes in the prompt
- Use a current model with proven Korean rendering (Gemini Nano Banana family, etc.) and generate 2–3 candidates, pick a clean one
- Never generate prices, brand names or legal copy — generate text-free and overlay in an editor
Step 2 — Adapt sizes by preservation
Adapt from one approved master, keeping text and logo pixels untouched while AI rebuilds only the background. Thirty sizes via regeneration means thirty chances to break; preservation has no breakage path at all.
Step 3 — Review in this order
- Brand name → 2. Numbers (price, discount) → 3. Legal copy → 4. body copy — ordered by the cost of being wrong. Korean review should be done by a Korean speaker, glyph by glyph, zoomed in.
How ImageFactory solves this
Step 2 is what ImageFactory banner resize does. Upload a master and it fans out to 1,400+ placements with text, logos and products kept as original pixels and only the background rebuilt — identical behavior across 15 languages including Korean. Verify with your own creative on the 14-day free trial.