How to write better Nano Banana prompts
Nano Banana (Google's Gemini image models: Nano Banana 2 and Nano Banana Pro) follows long, specific prompts well, so the more precisely you describe what should be visible, the closer the image gets to what you had in mind. Generic words like "nice lighting" or "red shirt" leave the model to guess.
A strong prompt names the subject and its details, the setting, the light, the camera and the mood, in plain sentences. The generator writes 60 to 120 words per variant along these lines:
| Part | What to write | Example |
|---|---|---|
| Subject | Who or what, with defining details | Woman in her 30s, freckles, auburn hair in a loose braid |
| Clothing and props | Type, color, fabric, details | Cream cable-knit turtleneck, gold hoop earrings |
| Setting | Place, background elements, depth | Lavender field, soft hills fading into haze |
| Lighting | Source, direction, quality, color | Golden hour, low sun behind her, warm rim light |
| Camera | Shot type, angle, lens | Medium close-up, eye level, 85mm f/1.4, creamy bokeh |
| Mood and style | Feeling, palette, aesthetic | Calm, nostalgic, editorial, warm muted tones |
Negative prompts, plain text and JSON
Every variant comes with a negative prompt: a comma-separated list of what to avoid, such as blur, watermarks, extra fingers or distorted faces. Keep it with the prompt when the generator you use supports negatives, or fold the most important items into the main prompt as "no …" phrases.
Plain text mode gives you natural-language prompts ready to paste anywhere. JSON structured mode adds a labelled breakdown of the same prompt (subject, accessories, photography, background, vibe and constraints) so you can change one element, like the lens or the background, without rewriting the rest.
Keep a character consistent across images
Turn on Consistency and describe the character once (or let the tool pick the traits out of your idea). The generator locks those identity anchors, such as face shape, hair, skin tone, build and outfit, and keeps them identical in every variant while the scene, pose and lighting change. Each prompt gets a drift-risk rating so you know which ones may need a reference image.
For the strongest likeness, generate with reference images too: Nano Banana 2 and Nano Banana Pro on PicX Studio accept up to 14 references per image.
- Describe identity traits precisely: "jet black wavy hair to the shoulders", not "dark hair".
- Change one thing per variant: the location, the pose or the light.
- Reuse the same identity anchor when you come back for more images.
