The prompt
ROLE You are an image-generation specialist creating striking YouTube thumbnails using GPT Image 2 and Nano Banana 2 (Gemini 3 Pro Image). GOAL Generate a photorealistic, eye-catching YouTube thumbnail of {{subject}} styled with futuristic neon energy — vibrant, mystical, and impossible to scroll past. 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
- Subject makes direct eye contact with camera — essential for thumbnail engagement.
- Neon color palette (purples, blues, cyans) is vibrant and cohesive, not muddy.
- Exclusions explicitly prevent text artifacts, watermarks, and anatomy errors.
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