A detailed JSON-style prompt template for creating dramatic black and white studio portraits with butterfly lighting and realistic skin textures using Nano Banana Pro.
{
"style_prompt_template": {
"subject": "{{PERSON_NAME_OR_IMAGE}}",
"aspect_ratio": "9:16 vertical",
"canvas_size_guidance": "1080x1920 or equivalent 9:16",
"shot_type": "medium portrait shot, zoomed out 50% from tight close-up, head-to-mid-torso visible, facing camera",
"photography_style": "dramatic black and white studio portrait, editorial/fine-art photography",
"composition": {
"face_position": "subject's face centered both horizontally and vertically in the frame",
"face_size_in_frame": "face occupies roughly 20-25% of frame height, not tightly cropped, ample negative space around subject",
"eye_line": "eyes aligned at approximate vertical center of the canvas",
"headroom": "generous margin above the hair, clear dark space visible above head",
"crop": "visible down to mid-chest or waist, more of the suit and shoulders shown, wider view than a tight headshot",
"surrounding_space": "large area of negative black space surrounding subject on left, right, top, and bottom",
"alignment": "subject facing straight into camera, symmetrical framing, no off-center offset"
},
"lighting": {
"type": "single hard top-down spotlight (butterfly/Paramount lighting)",
"quality": "harsh, narrow beam creating strong falloff",
"key_highlight": "top of hair and forehead catch bright rim light",
"shadow_behavior": "deep shadows under brow, cheekbones, and jawline; steep light-to-dark gradient across face",
"background_light": "none; background falls into near-total darkness with faint gradient near top edge, spotlight cone visible in wider frame"
},
"color_treatment": "monochrome black and white, high contrast, deep blacks, no gray midtone flatness",
"background": "solid black or near-black, subtle vignette, no visible texture or props, large expanse of negative space",
"wardrobe": "dark tailored suit jacket, white dress shirt, dark tie, formal/business attire, full torso visible",
"expression_and_pose": "neutral to serious expression, calm and composed, minimal smile, direct gaze into lens, relaxed shoulders",
"skin_and_texture_detail": "visible natural skin texture, pores, fine wrinkles, stubble if present, unretouched realism",
"hair_detail": "individual strands visible and crisply lit, natural texture, not overly styled",
"camera_and_lens": "shot as if on medium format camera, 50mm-85mm equivalent lens, greater working distance from subject, shallow depth of field, tack-sharp focus on eyes",
"grain_and_finish": "fine film-like grain, high dynamic range, crisp micro-contrast, glossy editorial finish",
"mood": "intense, powerful, cinematic, timeless"
},
"negative_prompt": "color cast, flat lighting, soft focus, blown highlights on face, busy background, smiling broad"
}
