How to Turn a Novel or Fanfic Into an AI Manga

You've got 80,000 words sitting in a Google Doc — a novel, a web serial, a fanfic with a following on AO3 or Wattpad — and you keep thinking "this would be so much better as manga." You're probably right. But adapting prose into a visual medium isn't a copy-paste job, and most people who try it either drown in the density of the source material or end up with a hundred flat, disconnected images that don't read as a story.

This is the workflow for doing it properly, using AI art to handle the drawing so you can focus on the part that actually matters: the adaptation choices.

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Adaptation is subtraction, not translation

The instinct when adapting your own novel is to keep everything — every line of internal monologue, every beat of backstory, every scene. Resist it. Prose and manga do fundamentally different jobs. A novel can spend three paragraphs inside a character's head; manga has to show that same emotional state in a face, a posture, a single line of dialogue.

Before you touch a prompt box, go through your source chapter by chapter and mark each scene as one of three things:

• Keep as panels — anything that's primarily action, dialogue, or a strong visual image (a reveal, an entrance, a fight, a confrontation).
• Compress into a caption or narration box — connective tissue: travel time, exposition, time skips. A single caption box ("Three days later, we reached the border.") does the work of a whole paragraph.
• Cut entirely — internal monologue that doesn't change what the reader needs to know, and description that exists to build atmosphere in prose but doesn't translate to a single image.

A rough rule of thumb: a 3,000-word chapter usually compresses to somewhere between 15 and 25 manga pages once you've done this pass. If your ratio is coming out much denser than that, you're probably keeping too much internal narration as dialogue.

Build a scene list before you generate anything

Don't jump straight into the AI generator. Take your trimmed chapter and turn it into a scene list — one line per beat, in order, noting who's in the shot and what's happening. This becomes your shot list for panels later, and it's much easier to spot pacing problems (three quiet scenes in a row, a fight that's over in one panel) on a list than after you've already generated art.

For a chapter, this might look like:

1. Establishing shot — the academy courtyard, morning
2. Protagonist arrives late, other students react
3. Close-up: rival character's disapproving look
4. Dialogue exchange (3-4 panels)
5. Instructor interrupts, calls the class to order

Each numbered beat maps roughly to one panel or a small panel cluster once you're in the studio.

Lock your characters before you adapt a single page

The single biggest thing that separates an adaptation that feels like a real manga from one that feels like a slideshow of unrelated images is character consistency. Your protagonist needs to look like the same person on page 1 and page 40.

In Gootaku, generate a character reference image first — a clean, forward-facing portrait — and reuse it as a reference across your panels. This meaningfully improves consistency (hair, outfit, general proportions carry over), but it's not perfect: expect some drift on things like exact eye shape or minor outfit details over a long adaptation, especially across many chapters. Re-anchor with a fresh reference generation every so often if you notice the character sliding, and don't be afraid to regenerate a panel that's clearly off-model rather than pushing through with it.

Translate description into panel direction, not prompt text

A common mistake: pasting a paragraph of prose description straight into the AI prompt. Novels describe things the way language does — associatively, at length, often more about feeling than composition. AI art prompts need something closer to a director's shot description.

Take a line like:

> "She stood at the edge of the rooftop, the city lights spread out beneath her like scattered stars, and for the first time in weeks she felt like she could breathe."

That's not a prompt. That's a panel: wide shot, character silhouetted against a lit-up city skyline at night, back to camera or three-quarter view, calm posture. Write it as blocking — angle, framing, what's in the shot — and let the mood come through visual choices (a wide panel for that "breathing" feeling, muted colors, negative space) rather than trying to get the AI to paint an emotion directly.

Dialogue needs to be cut down too

Novel dialogue is written to be read at prose pace, which is slower and more explanatory than how people actually talk. When you move a line of dialogue into a speech bubble, cut it by a third to a half. If a line doesn't fit comfortably in a bubble without shrinking the text into unreadable territory, it's too long — split it across two bubbles or two panels, or cut it further.

Fanfic-specific considerations

If you're adapting fanfic rather than original prose, a couple of extra things to keep in mind:

• Character likeness: if the fanfic is for an existing licensed property, you're on your own for how closely you want the art to resemble the canon designs — that's a creative and legal judgment call outside what any tool can make for you.
• Fandom shorthand: fics often assume the reader already knows relationships, backstory, and terminology from canon. A manga adaptation aimed at people outside the fandom will need a beat or two of extra visual context that the original text didn't need to spell out.
• Posting platforms: AO3-style long fics adapt more naturally to a chapter-by-chapter release schedule than trying to compress the whole thing into one giant upload — it mirrors how the original was likely read anyway.

A realistic pace for a first adaptation

Don't try to adapt an entire novel in one sitting. Pick your strongest chapter — usually the opening or a pivotal turning point — and adapt just that one first. It'll teach you your own compression ratio (how many prose words become one manga page for your particular writing style), which makes planning the rest of the book much more predictable.

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