# Soft 3D Avatar Style System

## Purpose

Use the six bundled square anchors—two female, two male, and two animal examples—to preserve one recognizable visual family across many different people and characters. They define rendering, proportions, facial abstraction, camera, composition, and mood. They do not define a universal character identity.

## Invariant Visual Tokens

### Face

- Mouth line: one short, thin, softly recessed closed-mouth seam, approximately 18–24% of face width. Center it close beneath the nose rather than midway between nose and chin. Keep the clear skin gap from the bottom of the nose to the top of the line at roughly 35–50% of visible nose height; never let it exceed one nose height. Keep the line nearly horizontal with a restrained upward turn at both ends, rounded soft terminals, and no corner dimples.
- Mouth color and depth: use a warm muted brown-peach only one or two tonal steps darker than the surrounding skin. The line should read through gentle indentation and shadow, not black pigment or a raised tube.
- Mouth anatomy: do not form separate upper and lower lips, lipstick, vermilion borders, an open cavity, teeth, tongue, or realistic folds.
- Eyes: vertically oriented glossy black ovals with small controlled highlights; no sclera, iris, pupil, lashes, or eyelid detail.
- Brows: short, dark, softly sculpted bars with restrained curvature.
- Nose: small, rounded, simplified 3D volume with soft side shadows.
- Ears: visible when hair and accessories permit; rounded and simplified.
- Expression: keep the mouth-line system stable. For neutral/calm, make it almost horizontal. For friendly/warm/confident, increase the end lift only slightly while using brows, eye highlights, posture, and lighting for most of the emotion. Do not use an open-mouth smile.

### Form and Material

- Premium stylized 3D toy/clay aesthetic, not a cheap plastic figurine.
- Smooth rounded geometry with broad, readable hair and clothing masses.
- Skin is soft matte-to-satin with gentle subsurface warmth and no pores.
- Hair uses sculpted locks or grouped volumes, never strand-by-strand realism.
- Fabric may show subtle felt, knit, or woven texture without becoming photorealistic.
- Metal and glass accessories use controlled highlights and remain subordinate to the face.

### Camera and Composition

- Use one 1254×1254 px square PNG master for mobile and web. Product surfaces may downscale it proportionally but must not upscale it. The product automatically applies a centered circular mask; compose for both the square preview and the final circle.
- Front-facing eye-level portrait.
- Centered, symmetrical visual balance; modest natural asymmetry in hair or clothing is acceptable.
- Bust or upper-torso crop with the full head and hairstyle visible.
- Portrait-lens feel with minimal perspective distortion.
- One character only unless a group composition is explicitly requested.

### Circular Crop Safe Area

- Treat the inscribed circle as the final visible canvas. Put only background and expendable outer shoulder area in the four square corners.
- Keep the complete head, hairstyle silhouette, ears, glasses, earrings, facial hair, and other identity-critical details comfortably inside the circle, not merely inside the square.
- Place the top of the hairstyle or ears approximately 11% below the square's top edge: target about 139 px in the 1254 px master, with a 10–12% production tolerance of approximately 125–150 px. This is equivalent to about an 8 px top gap in a 72×72 px circular avatar. Keep the widest meaningful hair/accessory extent away from the left and right edges.
- Aim for eyes around 42–45% of canvas height, the nose around 48–50%, the mouth-line center around 51.5–53.5%, and shoulders beginning around 70–76%. Treat the relative nose-to-mouth gap as the stronger rule; adjust absolute percentages slightly for face shape, tall hair, or headwear while preserving breathing room.
- Keep the face within the central area of the square. Do not push the character upward to maximize torso visibility.
- Allow outer shoulders and upper arms to continue behind the circular mask near the bottom corners; never place a required garment detail there.
- Do not add a pre-rendered circle, border, rounded-square card, vignette, or transparent circular cutout. Deliver a normal full square image; the product owns the mask.

### Lighting and Background

- Soft studio key light from slightly above and to one side, gentle fill, restrained rim separation.
- Smooth tonal transitions; avoid harsh shadows, blown highlights, neon spill, or cinematic color grading.
- Default to uniform pure white (`#FFFFFF`). Do not add a gradient, vignette, off-white tint, floor, horizon, texture, halo, or cast shadow on the background.
- Use another solid muted brand color or simple gradient only when the user explicitly requests it. Keep every background free of text, logos, furniture, and scenery by default.

## Variable Character Tokens

Vary these without breaking the style:

- Gender presentation and adult age impression.
- Natural skin tones across the full human range. Retain the same soft material and warm, respectful lighting; do not lighten or homogenize skin to match an anchor.
- Face width, jaw softness, cheek volume, nose proportions, and brow character within the simplified geometry.
- Hair length, texture, curl pattern, protective styles, color, hairline, bangs, part, and facial hair.
- Clothing category, cut, color, collar, textile, and occupation cue.
- Glasses, earrings, necklaces, headwear, hearing devices, and other requested accessories.

Avoid stereotypes. Use only attributes the user states or that are clearly visible in an identity reference.

## Style Boundary

Do not drift into:

- Photoreal portraits, realistic skin pores, anatomical eyes, or individual hair strands.
- Anime or chibi conventions, flat vector art, painterly illustration, or pixel art.
- Oversized bobblehead proportions, tiny bodies, extreme facial exaggeration, or emoji features.
- Missing mouth line; a mouth positioned too far below the nose; a nose-to-mouth gap larger than one nose height; a long or thick mouth; a black emoji smile; a deep cut or slit; raised tube-like lips; double lips; open mouth; teeth; tongue; corner dimples; or a highly exaggerated smile arc.
- A large hairless oval or rectangular gap cut into facial hair around the mouth. Let moustache and beard hair frame the approved short line naturally without obscuring it.
- Heavy makeup, freckles, wrinkles, or facial marks unless explicitly requested.
- Branded logos or copyrighted character costumes unless the user explicitly provides authorized assets and asks for them.

## Series Consistency Contract

For every avatar in one requested set, keep identical:

- Canvas orientation and approximate subject scale.
- Camera height, focal feel, frontal angle, and crop.
- Eye construction, mouth-line length/thickness/depth, material response, and facial abstraction.
- Lighting direction, softness, exposure, and background policy.
- Texture density and level of detail.
- Square canvas geometry and circular-safe subject scale.

Change only the character specification. Repeat the same style language in every generation prompt; do not summarize it away after the first image.
