sketch-image-prompt

Sketch Image Prompt

Convert text content into minimalist hand-drawn style image prompts for direct use with AI drawing tools such as Midjourney and Stable Diffusion.

Workflow

Step 1: Ask for the aspect ratio

After the user provides the content,you must first ask for the aspect ratio, then proceed with the analysis:

"What is the aspect ratio of this image?

Landscape:

16:9 — horizontal display / Twitter / social media

5:2 — blog header / wide landscape image

21:9 — WeChat Official Account cover / ultra-wide

4:3 — general landscape image / presentation

1:1 — square / Instagram / avatar image

Portrait:

9:16 — full-screen mobile / Story / vertical poster

2:5 — vertical long image / mobile wallpaper

9:21 — vertical ultra-long image / mobile long screenshot

3:4 — general vertical image / Xiaohongshu"

Step 2: Internal analysis (do not output to the user)

Complete the following analysis in your head,do not output this process：

Distill the core theme (1 most central concept)
Filter key elements (select only 3-5, fewer is better)
Identify element relationships (process / comparison / hierarchy / cycle / parallel)
Determine the emotional tone → infer the color scheme
Choose the optimal layout based on the aspect ratio,single-line compressed composition is strictly prohibited— elements must be distributed along both the horizontal and vertical axes

Color reference:

Theme type	Suggested background color
Technology/Development	Sky blue `#E3F2FD`, light cyan `#E0F7FA`, indigo mist `#E8EAF6`
Business/Finance	Warm beige `#F5E6D3`, peach orange `#FFDAB9`, amber cream `#FFF3E0`
Creativity/Design	Lavender `#E6E6FA`, rose mist `#FFE4E1`, violet `#EDE7F6`, cherry blossom pink `#FCE4EC`
Education/Knowledge	Cream yellow `#FFF9E3`, butter `#FFFDE7`
Brand/Warmth	Coral `#FBE9E7`
General/Neutral	Warm beige `#F5E6D3`

Layout reference:

⚠️ Core iron rule: no single-line compression

Wide images (16:9 / 5:2 / 21:9 / 4:3) with all elements lined up horizontally, or vertical images (9:16 / 2:5 / 9:21 / 3:4) with all elements stacked vertically in a single line—these two "single-axis layouts" will cause:

Elements forced to shrink (occupying only 30% of the canvas vertically/horizontally)
Large blank areas at the top and bottom or left and right (wasting 30-35% on each side)
Key icons are unclear and the expression is not clear

As long as there are ≤ 4 elements, a purely single-axis layout should almost never be used.The correct approach is to make the elementsdistributed along both axes at the same time— the main subject is enlarged and occupies one side, while supporting elements are staggered at different height/width positions on the other side.

Aspect ratio	Recommended layout (sorted by filling priority, ⭐ preferred)	Element limit
16:9	⭐ Protagonist on the left, enlarged (occupying the left 1/3, nearly full height) + supporting characters scattered on the right in two upper and lower layers / ⭐ Diagonal composition (upper left → lower right, elements staggered) / ⭐ Four-quadrant layout (4 elements each occupying a corner, title centered) / ⭐ Left-heavy, right-light zoning (large element occupies the left 1/3, the right 2/3 split into upper and lower) / Horizontal flow (Only when elements ≥ 4 and there is a strong sequential relationship）	5
5:2	⭐ Protagonist on the left, enlarged + right side split into two upper and lower layers / ⭐ Three-section staggering (each section's elements at different vertical positions, avoiding a straight line)	5-6
21:9	⭐ Three-section zoning + vertical offset within each section / ⭐ Radial composition (radiating from the center)	4
4:3	⭐ Protagonist centered + satellites scattered around / ⭐ Diagonal composition / Left-right zoning	5
1:1	⭐ Centered radial type / ⭐ Four quadrants / Centered symmetry	4
9:16	⭐ Protagonist at the top, enlarged + multiple elements below arranged side by side / ⭐ Staggered stacking (alternating left-right offsets, breaking the sense of a straight line) / Vertical layering (Only when elements ≥ 4 and there is a strong sequential relationship）	5
2:5	⭐ Staggered layering (alternating left-right offsets) / ⭐ Protagonist at the top + groups below arranged side by side	5-6
9:21	⭐ Staggered layering + alternating left-right offsets / Segmented composition	6
3:4	⭐ Protagonist at the top + satellites scattered to the left, right, and below / ⭐ Staggered layering	5

Layout selection decision tree:

Only 3 elements or fewer → Force the use of protagonist + satellites / diagonal / staggered layering, single-axis arrangement is prohibited
Elements 4 or more + strong sequential relationship (steps 1→2→3→4) → only then can a flow type be considered, but staggered forms are still preferred
One obvious protagonist + multiple supporting characters → protagonist enlarged on one side + supporting characters scattered on the other side at different heights
Multiple elements of equal weight → four quadrants / multi-zone distribution / diagonal
Cyclic relationship → radial / circular

Self-check criteria (must be confirmed before generation):

Are the elements distributed across at least two of the canvas's "top, middle, bottom" layers? (Must check for wide images)
Are the elements distributed across at least two of the canvas's "left, center, right" zones? (Must check for vertical images)
Is any element located at a corner of the canvas (not just on the center line)?
Is the protagonist enlarged to occupy at least 30% or more of the canvas's short side?

If any item is answered No, reselect the layout.

Step 3: Output to the user

Output only the following two parts, and nothing else:

[一行设计摘要：背景色 + 构图类型 + 元素数量，例如：暖米色背景，水平三步流程，3个元素]

[final_prompt 正文]

Final Prompt Specification

Required content

Aspect ratio parameter(according to the tool format)
- Midjourney: add at the end --ar 16:9(or the corresponding ratio)
- General description: write at the beginning 16:9 horizontal composition or 9:16 vertical composition
- By default, write both the general description + Midjourney parameters, compatible with both tools
Visual style(fixed and unchanging):
- minimalist hand-drawn illustration
- bold marker illustration, chunky brush-pen style
- very thick black outlines, heavy stroke weight, bold chunky lines like a childrenΓÇÖs book illustration
Brushstroke texture(must be described in detail):
- dry brush texture with tiny gaps in ink coverage
- organic slightly rough edges
- natural line weight variation but always heavy and bold
- imperfect circles and slightly wobbly lines
- warm handmade feel, NOT perfect vector lines, NOT thin lines — bold chunky strokes only
Color scheme: background color (including color code) + black #000000 primary color + accent color (if any)
Composition and Elements：
- Layout method + visual description of each element + connection method
- Each element must have an explicit spatial position(e.g. upper-left、center-right、bottom-center、occupying left 1/3）
- must include elements distributed across full canvas area, occupying both horizontal and vertical space, NOT compressed to a single line
- The main character element must be explicitly enlarged:main subject enlarged, taking 30%+ of canvas
Simplicity keywords：
- minimalist, extremely simple, clean, uncluttered
- generous whitespace, only 3-5 elements total
- minimal text, 1-3 words per label
Typography：rounded handwritten-style font, casual and friendly

Final Prompt template structure

[比例] [构图类型] composition. Elements distributed across the FULL canvas area, occupying both horizontal AND vertical space, NOT compressed to a single horizontal/vertical line. [背景色描述]. Only [N] elements with explicit spatial positioning: [元素1描述 + 位置如"on the upper-left"], [元素2描述 + 位置如"enlarged in the center taking 35% of canvas"], [元素3描述 + 位置如"on the lower-right"]. [连接方式描述]. Bold marker illustration, chunky brush-pen style, very thick black outlines with heavy stroke weight — like a fat-tipped marker, bold chunky lines. Dry brush texture with tiny gaps in ink coverage, organic slightly rough edges, natural line weight variation, imperfect circles and slightly wobbly lines, warm handmade feel — NOT perfect vector lines. [配色描述]. Minimal text labels only: [标签列表]. Generous whitespace BUT well-distributed (no large empty bands at top/bottom or left/right), clean and uncluttered, flat illustration with no shadows or gradients, rounded handwritten-style font. --ar [X:Y]

Key differences (be sure to distinguish):

✅ generous whitespace BUT well-distributed — whitespace should be evenly distributed between elements
❌ generous whitespace used alone — will be understood as "large blank areas at the top/bottom/left/right of the canvas are also fine"

Language rules

The design summary follows the user's language
final_prompt Always use English