What visual goals is this prompt best for?

Controlled visual concepts where composition, focal point, and finish need to work on the first pass. Reference-image workflows where identity, product shape, or silhouette should survive the restyle. Atmospheric concept work where texture, color, and mood cues matter as much as the subject itself.

What common mistakes should be avoided when using this prompt?

Ignoring the recommended 3:4 crop on the first run. The prompt's composition cues were written for that frame. Using a muddy reference image and expecting the prompt to repair identity, silhouette, or packaging structure on its own. Asking for readable type, logos, or packaging text without first removing the no-text constraint.

What are the recommended aspect ratio and settings?

Recommended aspect ratio is 3:4 using Nano Banana Pro. Negative prompt filters include: ugly, deformed, low quality, blurry, text, watermark, worst quality, low res.

Prompt Showcase/Vibrant Doodle Comic Portrait

Verified Prompt Recipe

Ratio 3:4Image-to-Image

Creator Reference:@YaseenK7212

Original Post

Vibrant Doodle Comic Portrait

Copy this Nano Banana Pro reference-guided prompt to create sketch visuals with photorealistic detail and neon color contrast. Best in 3:4 framing.

Master PromptClick to select all

{ "image_generation_task": { "task_type": "img2img", "input_source": "uploaded_user_image", "constraint": "preserve_full_likeness", "base_configuration": { "medium": { "substrate": "lined notebook paper", "tools": [ "ballpoint pen", "neon markers", "ink" ], "texture_details": [ "realistic ink absorption", "layered pen pressure", "stained edges", "smudges", "subtle paper wrinkles" ] }, "art_style": { "genre": [ "doodle art", "comic annotations", "sketch" ], "line_work": "thick-thin variation, loose freestyle, messy strokes, dynamic hatch shading", "atmosphere": "chaotic, energetic, spontaneous, dense" }, "rendering": { "resolution": "4K", "detail_level": "high", "lighting": "bold outer glow, vibrant contrast" } }, "composition_elements": { "framing": "portrait with thick border line around head", "surrounding_elements": [ "messy arrows", "stars", "underlines", "random scribbles", "speech bubbles", "overlapping annotations", "checkboxes" ], "iconography": [ "lightning bolt", "lightbulb", "music note", "mini self-caricature" ], "typography": { "style": "handwritten comic notes", "sound_effects": [ "ZAP!", "WHOOSH!" ] } }, "style_variations": [ { "id": "variant_01_pop_bold", "color_palette": [ "bold cyan", "magenta" ], "specific_vibe": "vibrant pop, stylish comic notes" }, { "id": "variant_02_neon_highlight", "color_palette": [ "neon pink", "neon yellow" ], "specific_vibe": "highlighter aesthetic, expressive gestures" }, { "id": "variant_03_electric_graffiti", "color_palette": [ "hot electric blue", "neon red" ], "specific_vibe": "graffiti-styled, exaggerated outline, playful highlights" }, { "id": "variant_04_dense_sketch", "color_palette": [ "blue linework", "red accents" ], "specific_vibe": "densely packed, horror vacui (no blank space), alive and messy" } ] } }

Optimal Generation Parameters

Aspect Ratio

3:4

ModelNano Banana Pro

Aesthetic KeynotesPhotorealistic, Neon, Reference-Guided

#sketch #comic #neon #dynamic #whimsical #pop-art #cartoon #bright

Test & Generate with GPT Image 2

Prompt tokens and APIMart GPT Image 2 are pre-loaded. Customize or click generate.

{
  "image_generation_task": {
    "task_type": "img2img",
    "input_source": "uploaded_user_image",
    "constraint": "preserve_full_likeness",
    "base_configuration": {
      "medium": {
        "substrate": "lined notebook paper",
        "tools": [
          "ballpoint pen",
          "neon markers",
          "ink"
        ],
        "texture_details": [
          "realistic ink absorption",
          "layered pen pressure",
          "stained edges",
          "smudges",
          "subtle paper wrinkles"
        ]
      },
      "art_style": {
        "genre": [
          "doodle art",
          "comic annotations",
          "sketch"
        ],
        "line_work": "thick-thin variation, loose freestyle, messy strokes, dynamic hatch shading",
        "atmosphere": "chaotic, energetic, spontaneous, dense"
      },
      "rendering": {
        "resolution": "4K",
        "detail_level": "high",
        "lighting": "bold outer glow, vibrant contrast"
      }
    },
    "composition_elements": {
      "framing": "portrait with thick border line around head",
      "surrounding_elements": [
        "messy arrows",
        "stars",
        "underlines",
        "random scribbles",
        "speech bubbles",
        "overlapping annotations",
        "checkboxes"
      ],
      "iconography": [
        "lightning bolt",
        "lightbulb",
        "music note",
        "mini self-caricature"
      ],
      "typography": {
        "style": "handwritten comic notes",
        "sound_effects": [
          "ZAP!",
          "WHOOSH!"
        ]
      }
    },
    "style_variations": [
      {
        "id": "variant_01_pop_bold",
        "color_palette": [
          "bold cyan",
          "magenta"
        ],
        "specific_vibe": "vibrant pop, stylish comic notes"
      },
      {
        "id": "variant_02_neon_highlight",
        "color_palette": [
          "neon pink",
          "neon yellow"
        ],
        "specific_vibe": "highlighter aesthetic, expressive gestures"
      },
      {
        "id": "variant_03_electric_graffiti",
        "color_palette": [
          "hot electric blue",
          "neon red"
        ],
        "specific_vibe": "graffiti-styled, exaggerated outline, playful highlights"
      },
      {
        "id": "variant_04_dense_sketch",
        "color_palette": [
          "blue linework",
          "red accents"
        ],
        "specific_vibe": "densely packed, horror vacui (no blank space), alive and messy"
      }
    ]
  }
}

Vibrant Doodle Comic Portrait

Nano Banana 2

Creative Blueprint & Recipe Breakdown

How to Master & Adapt This Visual

Professional prompts rely on modular tokens. Use this recipe breakdown to swap subjects, control studio lighting, and eliminate common AI artifacts.

Prompt Variables Blueprint (What to Customize First)

Iterate on one variable group at a time to maintain stylistic consistency:

1Change the subject block first: { "image_generation_task": { "task_type": "img2img", "input_source": "uploaded_user_image", "constraint":...

2Adjust the mood through light and backdrop cues: " ] } }, "style_variations": [ { "id": "variant_01_pop_bold", "color_palette": [ "bold cyan", "magenta" ],...

3Keep the finish constraints aligned while you test variants: " ] } }, "style_variations": [ { "id": "variant_01_pop_bold", "color_palette": [ "bold cyan", "magenta" ],...

3 Style Recipes

Swap the subject, keep the frameRecipe #1

Replace { "image_generation_task": { "task_type": "img2img", "input_source":... with your own subject while leaving the camera and composition cues intact.

Retune the mood, not the structureRecipe #2

Keep the subject block, then rewrite " ] } }, "style_variations": [ { "id": "variant_01_pop_bold", "color_palette": [... to move the image into a new lighting setup.

Push the restyle with a cleaner referenceRecipe #3

Start from a sharper or more contrasty source image, then edit finish descriptors only after subject preservation is stable.

Production Quality Guide: Best Use vs. Pitfalls

Ideal Use Cases (Where it Shines)

•Controlled visual concepts where composition, focal point, and finish need to work on the first pass.
•Reference-image workflows where identity, product shape, or silhouette should survive the restyle.
•Atmospheric concept work where texture, color, and mood cues matter as much as the subject itself.
✓Start with a sharp reference image. This prompt is written to preserve source identity, silhouette, or product structure before stylization.
✓Use 3:4 on the first run, then test alternate crops after the base composition is working.
✓This prompt suppresses text or logos. Remove that constraint before asking for branded packaging, typography, or visible watermarks.

Pitfalls to Avoid (Common Mistakes)

!Ignoring the recommended 3:4 crop on the first run. The prompt's composition cues were written for that frame.
!Using a muddy reference image and expecting the prompt to repair identity, silhouette, or packaging structure on its own.
!Asking for readable type, logos, or packaging text without first removing the no-text constraint.
✕Skip if: You need an open-ended exploration prompt rather than a strongly guided starting composition.
✕Skip if: You need to begin with a radically different crop than 3:4 instead of honoring the existing composition hints.
✕Skip if: Your reference image is low-resolution, badly lit, or cluttered enough to break subject preservation.

Technical Analysis & How This Prompt Works

Copy this Nano Banana Pro reference-guided prompt to create sketch visuals with photorealistic detail and neon color contrast. Best in 3:4 framing. Built...

Use a clean reference image with obvious subject edges and readable facial or product details before you start changing the styling. Keep the generator on 3:4 for the closest match. The mood is anchored by { "image_generation_task": { "task_type": "img2img", "input_source": "uploaded_user_image", "constraint":...