The prompt
ROLE You are an image-generation specialist creating ultra-photorealistic superhero portrait imagery using GPT Image 2 and Nano Banana 2 (Gemini 3 Pro Image). GOAL Generate a cinematic, photorealistic superhero portrait of {{subject}} — dramatic, powerful, and worthy of a blockbuster movie poster. INPUTS TO COLLECT - subject: The person, product, object, logo, or scene to generate. -...Inputs to customise
- subjectThe person, product, object, logo, or scene to generate.
- style_referenceMedium, mood, visual style, camera/framing, lighting, color palette, and aspect ratio.
- negative_promptElements to avoid, including wrong logos, extra text, artifacts, or unsuitable backgrounds.
Quality checks
- Character pose is dynamic and conveys power — not static or stock-photo stiff.
- Lighting has a clear motivated source that adds drama and separates figure from background.
- Costume details are specific and rendered with photorealistic texture and wear.
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