Preparing for release — Preparing for release
Start VTuber
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Male sample character with black hair, amber eyes and a navy and black outfit

HOW TO USE

One step at a time,get ready to stream.

Follow the new app from Characters to Camera setup and Stream setup, using the controls in the development build.

  1. Prepare your PC

    Windows x64 and WebView2 Runtime. Check the requirements page too.

    Illustrated software package featuring Aster; not a physical product
    Learn more

  2. Choose from Characters

    Try the display with a supplied character.

    Bust-up Aster bundled with the development build
    Learn more

  3. Set up your camera

    Set up the camera for your movements when needed.

    Bust-up Aster bundled with the development build
    Learn more

  4. Prepare the layout and OBS

    Check the display and recording in OBS on the same PC.

    Bust-up Aster bundled with the development build
    Learn more

Actual adopted app screens, captured with the camera and output stopped.

Preparing for release

Choose a ready character and prepare your stream.

In the development app, choose “ログインの流れを試す” (Try the login flow) to open “キャラ一覧” (Character list). This is a local trial, not real authentication or entitlement verification. Start with bust-up Aster, included in the development build.

What you will need

What you will need

Windows PC

Windows x64 and WebView2 Runtime. Check the requirements page too.

Camera

A built-in or USB PC camera for checking head, eye and mouth input. Not needed for image review alone.

OBS Studio

Separate software for composing your stream. It is not bundled with Start VTuber.

Microphone & headphones

For voice streaming. Configure audio in OBS.

Check the rights to illustrations you bring in

You need a lawful basis, such as your own work, the rightsholder's permission or an applicable license. Buying an image does not necessarily permit editing, streaming, commercial use or processing by a cloud provider. Check the permitted uses before sending it; ask the rightsholder if unclear.

Terms of use
  1. 01

    Choose from Characters

    Start with bust-up Aster, included in the development build. After the entry screen, open Characters and select “Use this character” for Aster, the male sample, or a received character. Wait for rendering. The selection is saved on this PC; the camera has not started.

    Characters in the new app

    Choose a prepared character and continue to display and setup.

    Characters in the new appView larger image ↗
  2. 02

    If you want a new character

    Generating a new character from text or reference images is not available in the new UI yet. “新しいキャラクターを作る” opens information about creation. For now, select a prepared character from “キャラ一覧”.

    Creation method interaction preview

    Browser interaction example for creation methods. Image generation is not connected.

    Creation method interaction previewView larger image ↗
  3. 03

    Set up your camera

    In Camera setup, choose a device and select “Start camera”. Review any permission prompt yourself. Expand or collapse your camera image using the preview controls. Watch the character and recognition status before measuring.

    Start cameraBegin camera setupMeasure this poseSave these settings

    • A saved profile keeps your existing sensitivity. Use “Continue to stream setup with these settings” if no new measurement is needed.
    • To measure again, start setup and follow front, up, down, your left, your right, then normal motion. Move comfortably while keeping the screen visible.
    • “Measure this pose” shows remaining seconds and recognition status. If it fails, read the reason and retry this step. Canceling retains the previously saved profile.
    • Finish with “Save these settings”. If only your seating position changed, hold still facing forward and recenter. Your camera image stays inside settings and is not broadcast or saved.
    Camera setup in the new app

    Select a camera, then check its image and the character response to adjust settings.

    Camera setup in the new appView larger image ↗
  4. 04

    Prepare the layout and OBS

    In Stream setup, drag the character to move it. Resize with the bottom-right handle or size slider, or choose the bottom-left/right presets. Wait for the saved/output-applied status, then select “Start output” and “Copy OBS URL”.

    • On the same PC, create a test scene in OBS and add a Browser source. Disable Local file and paste the URL.
    • Start at 1280×720 and 30 fps. Recheck placement if you change the aspect ratio.
    • Turn off source shutdown when hidden. Put your background below the transparent character. The checkerboard, handles and camera image are excluded from output.
    • Starting output does not start a live stream. Set up audio separately in OBS and make a short local test recording. Real-face tracking and minimized simultaneous operation still require hardware checks.
    OBS official guide: Browser Source ↗
    Stream setup in the new app

    Adjust character position and size and prepare to display it in OBS.

    Stream setup in the new appView larger image ↗
  5. 05

    Save, close and resume

    Save camera measurements with “Save these settings”. Position and size save automatically or with “Save layout”; wait for the saved status. Stop camera and stop output are separate controls. After fully closing and reopening the app, check the restored settings and start the camera/output you need.

If you get stuck

No character appears

Wait for loading and check the selected character. If an error appears, use Reload rendering. Keep the error text and character name if it repeats.

Camera unavailable

Check USB, Windows camera permissions and use by another app. Stop, refresh the camera list and select again. Adjust face position and lighting if recognition fails.

Cannot create a new character

Generation and production entitlement checks are not connected in this UI. Existing characters remain usable. View plans opens information; it does not purchase or grant access.

Layout not restored or OBS blank

If saving failed, retry Save layout without discarding your edits. Check output start, URL and 1280×720 in OBS, then reload the Browser source if needed.

FAQContact
Previously saved projects

For older projects only, open “設定・バックアップ” → “現行画面の保存作品へ” to use the previous editor. This does not export the new UI’s characters and placement settings together.

More: screen labels and differences from earlier versions

Live camera tracking and OBS recording were not tested in this site capture. Only the creation-method image is a browser interaction example.

Source: adopted mouth-preservation-v1, after the lip fix (9 September 2026). Cropped to the controls to exclude personal and diagnostic information.