The Nano Banana Pro JSON Prompt Pack (Copy, Paste, Remix)

Nano Banana Pro is the consistency workhorse of late 2026: native 4K, legible in-image text, and — the part people actually want — the same character, palette and layout across a whole batch. The trick that makes it repeatable is structured (JSON) prompting. Instead of one sentence you hand it named fields, so your tenth image matches your first.

Below are three ready packs. Copy the JSON into Nano Banana Pro (Gemini), or tap Open in Prompt Architect to load the exact setup in the visual builder and tweak it.

Why JSON for Nano Banana Pro

A sentence is easy to write and impossible to reproduce — change one word and the whole image drifts. Named fields pin each decision down: subject, style, lighting, palette, negatives. Nano Banana Pro parses them cleanly, so you can hold a look steady, swap one field, and keep everything else fixed. That's the difference between a lucky generation and an on-brand set.

1. A reusable brand character

{
  "subject": "friendly robot barista, front 3/4 view",
  "role": "reusable brand mascot",
  "style": "modern bento UI illustration, Apple-clean",
  "material": "3D matte plastic, pastel purple + blue, gold accents",
  "lighting": "soft studio softbox",
  "palette": ["#a78bfa", "#60a5fa", "#f59e0b"],
  "aspect_ratio": "1:1",
  "consistency": { "lock": ["face", "proportions", "palette"], "vary": ["pose", "background"] },
  "negative": "text, watermark, extra limbs"
}

Lock a mascot once and reuse it across your product line — same face, same proportions, different scene. Open in Prompt Architect →

2. Editorial product shot

{
  "subject": "luxury skincare bottle on wet stone",
  "style": "editorial product photography, macro",
  "material": "frosted glass, subsurface scattering",
  "lighting": "moody editorial, controlled shadows",
  "aspect_ratio": "4:5",
  "detail": "4K, legible label text",
  "negative": "clutter, plastic look, harsh flash"
}

Hold the lighting and material fixed, swap the product — every shot in the campaign matches. Open in Prompt Architect →

3. Isometric scene

{
  "subject": "isometric cutaway of a cozy ramen shop at night",
  "style": "isometric diorama, 30-degree angle",
  "material": "soft plasticine clay",
  "lighting": "warm interior glow, neon spill outside",
  "aspect_ratio": "16:9",
  "negative": "perspective distortion, flat view"
}

A clean base for a series of diorama scenes that all share one world. Open in Prompt Architect →

Make it yours

Each link lands in the Studio with the style, material and model pre-selected. Save your version as a Style System — your reusable "Image-DNA" — and apply it in one click so every future generation stays on-brand. Open the Studio →

— The Prompt Architect team