Source: https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/

# Sketch a Masterpiece

Sketch a Masterpiece takes a line drawing — anything from a napkin doodle to clean line art — and uses it as a structural skeleton for a generation. ControlNet reads the strokes, the main model paints inside them. You decide what the strokes _become_ through the prompt.

It's the fastest path on Pocket from "I have a vague composition in my head" to "I have an image that follows that composition."

[Watch the tutorial video](https://www.youtube.com/watch?v=SYUG7lZY9Z8)

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#what-it-does)What it does

Pocket ships four preprocessor/model pairs so the underlying ControlNet can match the kind of input you have:

-   **Scribble** — freehand drawings, loose scribbles, kid-style art. Most forgiving.
-   **LineArt** — clean line art of any subject. Translates to any style.
-   **LineArt Anime** — tuned for manga and anime lines.
-   **Canny** — works from outlines. Best with an inverted reference (white lines on black).

The mode is the same idea every time: the model preserves geometry, you reinterpret texture, lighting, color, and style through the prompt.

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#how-to-start)How to start

1.  Open the Advanced Guidance panel and tap **Sketch a Masterpiece**. Pocket opens a sketch canvas.
2.  Either draw directly on the canvas, paste an image from your library, or capture a sketch with the camera.
3.  Pick the ControlNet variant that matches your input (Scribble for rough lines, LineArt for cleaner work, Canny for outline-style images).
4.  Write a prompt that describes the _look_ — lighting, materials, color palette, style — not the layout. The sketch already covers layout.
5.  Generate.

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#conditioning-strength)Conditioning strength

ControlNet strength controls how strictly the result has to follow the sketch:

-   **Above 80%** — geometry is locked. Good for storyboard frames where pose must match.
-   **60–80%** — balanced. The model can soften awkward proportions while keeping the composition.
-   **Below 60%** — the sketch becomes a loose suggestion. Useful when your lines are very rough.

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#prompt-tips)Prompt tips

-   **Describe lighting and style separately from structure.** "Oil painting, warm rim light, golden hour" — not "a person standing." The sketch is "a person standing."
-   **Style triggers help.** Adding a Sogni style (or a strong artist/medium reference) gives the model a clear target.
-   **Push steps up.** 30+ steps consistently gives ControlNet work more headroom than the default.
-   **Try inverting the canvas.** The Invert button (bottom-right) flips white-on-black to black-on-white. Different preprocessors prefer different polarities, and the result can change dramatically.
-   **Line width matters.** Thick strokes read as solid shapes; thin strokes read as edges. Adjust the brush before drawing.

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#what-is-preserved-vs-reinterpreted)What is preserved vs reinterpreted

| Preserved | Reinterpreted |
| --- | --- |
| Geometry, silhouettes, composition | Texture, materials, surface detail |
| Pose, framing, perspective lines | Lighting, color palette, mood |
| Number and rough position of subjects | Style (photoreal, painterly, anime, etc.) |

If the sketch has a face, the _position and proportions_ of the face carry over — but not the identity. Use [Face Transfer](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/face-transfer/) for that.

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#workflows)Workflows

**Napkin sketch to concept art.** Rough out a thumbnail on the canvas, set strength to 65%, prompt for a moody concept-art style, generate a batch.

**Kid's drawing to storybook page.** Photograph the drawing, run it through Scribble at high strength, prompt for "children's book illustration, watercolor, soft light."

**Storyboard pass.** Sketch each frame at a consistent style. Use the same prompt across frames so only the geometry changes.

**Logo or icon ideation.** Sketch a silhouette, switch to Canny, prompt for the material (chrome, neon, paper-craft) you want to test.

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#tips)Tips

-   A clean, high-contrast sketch outperforms a detailed one. Edges matter more than fills.
-   If results ignore the sketch, raise strength. If results look traced, lower it.
-   Avoid prompting for "a sketch of …" — the model will draw a sketch _on top of_ your sketch.

## [#](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/sketch-a-masterpiece/#see-also)See also

[ControlNet— the four Pocket guidance modes.](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/)[Face and Pose Capture— when pose, not lines, is what you want to lock.](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/face-and-pose-capture/)[Depth Map— when spatial layout matters more than edges.](https://docs.sogni.ai/sogni-create/pocket/advanced-features/controlnet/depth-map/)[Advanced Features— Pocket's other power tools.](https://docs.sogni.ai/sogni-create/pocket/advanced-features/)