🦋 Mock YouMind Illustration

【Function Description】

Generate hand-drawn illustration images in YouMind style based on specific content

【Content Source】(Priority Order)

1. Selected text content

2. Full content of current document

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

【Style Definition】

I. Overall Aesthetics (Positioning Preface)

• Simple and cute illustration style, flat graphic design, non-photorealistic rendering, hand-drawn feel, embracing natural imperfections rather than perfect precision.

II. Character Design (Strong Structural Constraints)

【Priority】Read the material collection in the illu attachment, prioritize using character designs that already exist and frequently appear in **illu**

【Reference Descriptors】

Core Features (CRITICAL):

• Facial Structure:

Side profile or 3/4 view angle

Forehead line and nose form a continuous side profile contour line (not separated)

Small 60-degree angle at nose tip, overall not exceeding 1/2 of head width

Eyes are pure black small dots (bead eyes) or simple arc smiling eyes, no pupils/whites or other details

Mouth is a smiling arc or rounded inverted triangle based on scene and character state, no fill, no need to fully conform to symmetry and perspective

• Head-Body Structure:

Head and body in continuous cylindrical form, absolutely no neck

Head directly merges into body forming a single cylindrical shape

• Limb Structure (Key):

Arms: Maintain uniform tubular thickness from shoulder to fingertips, approximately 40% of torso width, no elbow/wrist narrowing

Hands: Width equals arm width, like simple gloves/paddle shape directly connected

Legs: Maintain uniform tubular thickness from hips to toes, approximately 50%-60% of torso width, no knee/ankle narrowing

Feet: Width equals leg width, like simple blocks directly connected

Essence: Reject anatomical joint tapering, maintain tubular consistency

"Chunky but not fat" effect—the key is uniformity rather than thickness

• Proportions: Head-to-body ratio 1:3, chunky not slim

• Anatomical Check: Strictly ensure each character has 2 hands, 2 eyes, 2 legs; head, body, hands, legs maintain consistent skin color (default no fill)

• Styling Reference: Hairstyles (explosion curls/ponytail/wavy curls, etc.) and clothing (shorts/long pants/overalls, etc.) match specific designs in illu, loose casual clothing with fashion sense but not overly complex.

III. Line Quality (Soft Description)

• Natural hand-drawn marker paper bleed effect, with warm human touch

• Organic line weight variation (not mechanically uniform), baseline 3-5px range

• Edges with slightly rough fuzzy texture, like dry brush strokes

• Natural line wobble and slight discontinuity effects, showing hand-drawn instability

• Balance clarity with handcrafted organic feel, avoid overly smooth vector lines

IV. Fill Texture

Character skin, background, and most areas remain unfilled, with localized soft crayon colors added

【Color Ratio】(Hard Constraint):

• Primary color: 10-15% (usually a single clothing item on one character)

• Secondary color: 2-5% (small objects or accessories)

• Accent color: 1-2% (tiny details)

• Black fill: Not exceeding 5% (such as shoes, etc., localized areas)

• 85-90% should be white background + black unfilled line art

【Fill Method】(Hard Constraint)

• Colors slightly misaligned with outline 5-7px, with relaxed hand-coloring feel

• Color edges soft and irregular, like natural crayon bleed on paper

• Preserve directional brush strokes and uneven texture of hand coloring

• Avoid perfectly aligned digital fill effects, don't strictly fill edges

V. Composition

• Scene Theme: Full of playfulness and storytelling (such as collaboration, exploration, discovering creativity)

• Simplification Principle: Avoid excessive details, maintain clean white space

• Decorative Elements: Total 2-5 items, choose imagery based on content

• Common: Including but not limited to stars (dot/cross/five-pointed/eight-pointed), light bulbs, books, waves, paper airplanes, paintbrushes, etc.

• Background: Pure white or minimalist, no perspective, shadows, or horizon line

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

【Prompt Construction Strategy】

Framework Constraints + Open-ended Description:

✓ Hard Constraints (Must Execute Precisely):

Facial structure (nose integrated into contour, bead eyes)

Neckless cylindrical body

Uniform tubular limbs (hands and feet equal width, no joint narrowing)

Color ratio limits

Anatomical check (2 hands, 2 eyes, 2 legs)

Ratio check (16:9, horizontal format)

✓ Soft Descriptions (Guide Direction, Leave AI Creative Space):

Line quality: "Natural hand-drawn marker feel with organic line weight variation"

Fill texture: "Soft crayon-like color with gentle edges, slightly loose hand-coloring"

Avoid micromanaging every pixel detail

Example Comparison:

❌ Overly Precise: "Line wobble 4-6px, edge density 4-5 roughness per 10px"

✓ Appropriate Guidance: "Hand-drawn lines with natural wobble and slightly rough edges"

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

【Quality Check Checklist】

Pre-generation Must-check Items (CRITICAL):

☑ Characters have only 2 hands, 2 eyes, 2 legs

☑ Head and body cylindrical as one unit, no neck

☑ Nose small and integrated into facial contour (not separated lines)

☑ Limbs uniformly tubular, hands/feet equal width to arms/legs

☑ Decorative elements count 2-5 items

☑ Reference illu design features (hairstyle, clothing)

☑ Color scheme matches content and ratio controlled (primary color ≤15%)

Technical Limitation Statement:

If AI model cannot fully achieve certain hand-drawn texture details, use soft descriptions in prompt to guide direction, and honestly inform users of technical limitations after output.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

【Output Specification】

Prevent Caching:

Declare at beginning of prompt:

"GENERATE A FRESH UNIQUE VERSION - DO NOT USE CACHED RESULTS. Create new interpretation with natural variation."

【Output Content】

Content Analysis: Brief description in English of understanding and positioning of content source (no more than 70 words, no title)

Core Image: Strictly 16:9 horizontal aspect ratio, text prohibited

Do Not Output: Do not output textual descriptions of image style details

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

【Core Philosophy】

Less is More:

• Structural features use hard constraints for precise control (nose, limbs, color ratios)

• Textural features use soft descriptions to guide direction

• Pursue "hand-drawn feel with warmth" rather than "mechanically executed pixel precision"