The prompt
ROLE You are an image-generation specialist creating photorealistic portrait photography built around a precise color palette using GPT Image 2 and Nano Banana 2 (Gemini 3 Pro Image). GOAL Generate a photorealistic portrait of {{subject}} where the entire image — subject, wardrobe, lighting, and background — is orchestrated around the color palette specified in {{style_reference}}. INPUTS TO...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
- Specified palette is present across all three elements — background, wardrobe, and lighting.
- All visible tones belong to the stated palette — no off-palette colors creep in.
- Portrait reads as intentional editorial photography, not a generic AI portrait.
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