# Writing for the models you choose

> In Studio your words go to the model you chose as you wrote them — how to name your references, use Improve my prompt, Leave out and Seed, and get a price.

On a model's page in Studio, you write for that model directly: your words go to it as you wrote them, and nothing is added behind them. (Optic is different — ROUTIX reads your words and writes the model's instructions itself; see [Writing Optic prompts](https://routix.studio/help/prompts/writing-optic-prompts).)

## A shape that works

**For a video:** who or what, doing what, where, in what light — and how the camera moves. *"A cyclist in a yellow rain jacket rides through a wet city street at dusk, neon reflections on the asphalt; the camera tracks alongside at handlebar height."*

**For a picture:** the subject, the setting, the light, the framing — and any words on it, quoted exactly. *"A ceramic coffee cup on a linen tablecloth, soft morning window light from the left, close-up, shallow depth of field."*

Every video and picture model needs your words; only Forge, ROUTIX's own tool, can work from your pictures alone.

## Naming your references

Type `@` in the words box and pick one of your pictures, clips or recordings. Studio writes the tag in the way your model reads it:

- Models that read numbers get each reference by its number — Image 1, Image 2, Video 1… Say what each one gives the take: *"Image 2 is the jacket"*.
- Models that cannot tell references apart by number read one of each kind — *"the picture"*, *"the clip"*, *"the sound"* — and the page says so. Describe in words what each one shows.

Each model's page says which way it reads, under **Naming your references**. In a mode that follows references, add at least one: *"Add at least one picture or clip for … to follow."*

## Improve my prompt

Where it can help, **Improve my prompt** rewrites your words for the model you chose. It is free, nothing runs until you press **Make**, and **Back to mine** brings your own words back — *"Improved. It's yours to edit — nothing runs until you press Make."* It is not offered on Optic, Forge or the upscaler.

## Advanced: Leave out and Seed

Under **Advanced**, where the model has them:

- **Leave out** — *"What must not appear"*.
- **Seed** — **Random** or **Fixed**. *"The same seed and words make a similar take — not always the same one."* A model with no seed says so: *"This model takes no seed: every take is new."*

## Sound

On a video model that can make its own sound, **Sound** is your switch — it starts off. Turn it on for a take with sound.

## The price

The price is on the **Make** button before you press — *"Make · … credits"* — and beside each length, size or quality that changes it. When a choice is still missing, the reason sits beside the button instead: *"Choose a length to see the price."*, *"Add a first frame to see the price."* One press makes one take; if it is not delivered, its credits come back.

## Examples

A model's **Examples** show takes with the exact words that made them. **Use this prompt** puts those words in your box — nothing runs until you press **Make**.

Source: https://routix.studio/help/models/writing-for-studio-models · Updated 2026-10-20