Nano Banana Pro

Photorealistic Celebrity Encounter Selfie with Controlled Expression

A highly constrained JSON prompt for Gemini Nano Banana Pro designed to generate a photorealistic selfie with a celebrity (implied, but the focus is on the foreground subject). The prompt enforces strict realism constraints and specifies a

Prompt text

Original English text. Replace placeholders with your own details.

{
 "metadata": {
 "prompt_version": "1.1.1",
 "generation_goal": "Photorealistic, believable celebrity encounter selfie",
 "determinism": {
 "pose_lock": true,
 "camera_lock": true,
 "anatomy_lock": true,
 "composition_lock": true,
 "perspective_lock": true
 },
 "realism_constraints": {
 "no_cartoony_proportions": true,
 "no_exaggerated_limb_length": true,
 "no_fisheye_distortion": true
 }
 },
 "subjects": [
 {
 "role": "Foreground subject",
 "description": {
 "gender_presentation": "Female-presenting",
 "expression": {
 "facial_emotion": "{argument name="facial emotion" default="Calm confidence"}",
 "details": {
 "eyes": "Relaxed, steady gaze toward the phone screen, lids naturally lowered",
 "eyebrows": "Neutral position, no exaggerated lift or tension",
 "mouth": "Soft, closed-lip smile or very slight parting, controlled and effortless",
 "jaw": "Relaxed with subtle definition, no tension"
 },
 "vibe": "Casual, self-assured, socially fluent — comfortable around celebrities",
 "avoid": [
 "Wide eyes",
 "Open-mouth excitement",
 "Raised eyebrows",
 "Overt surprise expressions"
 ]
 },
 "body_language": {
 "posture": "Upright but relaxed, shoulders loose",
 "energy": "Unbothered, composed, intentional",
 "intent": "Posing casually, as if this is a normal social moment"
 }
 }
 }
 ],
 "mood": "Effortless, grounded, cool, unmistakably real"
}

Source & attribution

Sienna · Awesome Nano Banana Pro Prompts

Source-listed license: CC-BY-4.0. Prompt text is preserved; titles and previews may be shortened for display. Source examples are not NexGateHub test results.

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