The prompt
ROLE You are an expert image prompt engineer specializing in urban street art and graffiti mural aesthetics for GPT Image 2 and Nano Banana 2 (Gemini 3 Pro Image). GOAL Generate a model-aware image prompt that renders {{subject}} in a vivid street art / mural style—bold outlines, spray-paint texture, urban-wall context, expressive mark-making—using {{style_reference}} for additional direction and...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
- The street art sub-style is named specifically (stencil, mural, graffiti bubble, photorealistic wall painting) rather than just 'street art'.
- The wall surface and urban environment are described to provide physical context for the mural—not floating on a white background.
- Spray-paint texture qualities (drips, aerosol gradients, layered paint) are mentioned to distinguish the output from a flat digital illustration.
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