Prompt systems and tools for synthetic people.
Sintetico
Realistic, consistent people, built from nothing. We sell the method behind them: prompt packs and a lab that turns any image into a prompt for your own character.
Every convincing person is built in layers. So is every prompt that makes one.
What people see first: pores, freckles, light on a cheek. Most prompts stop here.
Cut 1 of 7 · Head in a faceted crystal shell, face covered in skin
Scroll, drag, or press a layer.
The collection
Twelve heads from one series. The same crystal, the same light, a different layer each time. Keeping everything else fixed is the craft.
One face, three sessions.
Hair, eye colour and light change. The person doesn't. That is the whole job of a synthetic character, and it's what the packs teach.
Session oneDark waves, green eyes Session twoHair pulled back, brown eyes 
Session threeGlass hair, blue-grey eyes
Build a person.
The dissection went in. Building goes the other way, from the rules underneath to the skin on top. Pick what the face is made of and the prompt writes the reference portrait your character starts from.
The prompt
Vertical head-and-shoulders portrait photograph of an adult woman in her late twenties, facing the camera. Oval face, soft jawline. Auburn hair, green eyes. Light freckles across the nose and cheeks. A steady, knowing look into the lens, lips slightly parted. Soft window light from the left, the same in every shot. A smooth off-white wall behind, nothing else in the frame. A plain black crew-neck top, the same in every shot. Shot on an 85mm lens at eye level, natural skin texture, no retouching. This is the reference portrait of a recurring character.
- Bone
- Structure
- Muscle
- Fascia
- Skin
Written for Nano Banana. The Genesis pack takes the same face through Flux and Krea, and keeps it identical from one image to the next.
Twelve people who do not exist.
Twelve reference portraits, made the way Build works above: five layers, one option per layer, one prompt, generated once. Genesis has eight options per layer instead of three, and these are twelve of the faces it can make. Under each face is its recipe, one code per option, in the colours of the layers. Nobody sat for them.
Point at a code under a face: it says what it is, and who else was built on it.
The Bone layer is what never changes between shots: the wall, the light, the top. Six stand on an off-white wall, three on grey seamless, three on black. Seven wear a black crew-neck, five a cream shirt. One lens, one distance.
01 · The Editor
A woman in her fifties.
- BoneWindow light · Bare wall · Black crew-neck
- StructureAngular, high cheekbones
- MuscleGuarded
- FasciaFine lines
- SkinSalt-and-pepper, brown eyes, tan
Five of these seven blocks are in Build above. The other two are in Genesis.
The Lab
Any image in. Your prompt out.
The Lab reads the scene, the light, the lens and the framing of any photograph, leaves the person out, and writes the prompt in the format your model understands. It hands you words to copy, never a picture: the image is made in your own tool, where your character takes the stranger’s place.
- 1
Drop in the photo you want to copy
Any picture, from anywhere: a café, a street, a studio portrait, one of the examples below. It does not have to be a photo of you — it is the shot whose light and framing you want to borrow.
- 2
The Lab reads it and writes a prompt
Scene, light, lens, angle and crop, with the person left out. What comes back is text. The Lab does not make pictures.
- 3
You generate the picture, with your character
Paste the prompt into Nano Banana, Flux or Krea together with your character's photo. That is where your character takes the stranger's place.
Examples
The examples are always free.
Try it on one of the examples under the viewer, or drop any photo on it. The prompt appears here, ready to copy.
Two things
One is where a character begins, and it is bought once. The other is what you keep, and it carries the Lab inside it. Both arrive as a Notion page.
No. 001Skin One plate. Bought once, yours to keep.
Genesis
Build a face that does not exist, and keep it.
$12one time
A Notion page, yours to keep.
- Forty building blocks across five layers, and twelve faces already built from them
- An identity lock that holds the face through new scenes, light and outfits
- Every prompt written three times: Nano Banana, Flux, Krea
- What never to name — the page that decides whether a character survives
Read a sample prompt
Studio portrait of a woman in her mid twenties. Heart-shaped face, wide at the temples, narrow chin. Neutral mouth, eyes level, no expression offered. Light freckles across the nose and cheeks. Copper red hair to the jaw, blue eyes, freckled fair skin. A plain black crew-neck top. A pure black background. One hard key light from the upper left. 85mm lens at eye level, head and shoulders, photorealistic.
Paid through Stripe. The page reaches your inbox a minute later.
A stack that grows. New plates every month, the Lab inside.
- Skin · No. 001
- Muscle · No. 008
- Bone · No. 010
The Atlas
The plates of the body, and the map of the world.
$14per month
The same Notion atlas, with new plates each month.
- A hundred reads a month in the Lab: any photograph in, your prompt out
- The session prompts: ten images that look like one afternoon, not ten
- New plates every month — scenes, light, wardrobe, treatments
- Genesis included, so a character can begin here too
Get early accessTry it in the Lab aboveRead a sample prompt
Same room as the previous image: a smooth white wall fills the background, a pale concrete floor with no joints, nothing on the walls, one window out of frame on the left casting a single sharp shadow. She sits on the floor against the wall, knees drawn up, looking at the camera. Same outfit, same light.
Opening soon. No payment now.
Be there when it opens.
One email on the day The Atlas opens, with the Lab inside it. Nothing before, nothing after. Genesis is already on sale, in the packs above.
Questions
What is Sintetico?
A label by Pionio for synthetic people: images, prompt systems and small tools for building realistic, consistent characters from nothing.
Can I buy it now?
Genesis, yes: $12 once, and the Notion page reaches your inbox a minute after you pay. The Atlas opens soon. Join the list and you get one email, the day it opens. Nothing before, nothing after.
How do the packs arrive?
As a Notion page you keep. Genesis is bought once and stays yours; The Atlas is the same page, with new plates added every month for as long as you subscribe.
Which tools do the prompts work with?
Nano Banana (inside Gemini or Higgsfield), Flux and Krea. Every prompt is written three times, because the same words behave differently on each.
Do I need a GPU or ComfyUI?
No. The prompts work in web tools you already use.
Can I use the results commercially?
Yes, the prompts are yours to use in your own work and for clients. Check the license of the image model you run them on.
Can I recreate a real person?
No. Sintetico builds people from nothing. Nothing here is meant for copying a real person's face, and the Lab leaves the person out of every prompt it writes.
Are the twelve faces real people?
No. Each of the twelve was written as a prompt first, from the forty blocks in Genesis, then generated once and kept. Nobody sat for them, and no real face was used.