---
title: "Use Auto-Skeleton"
canonical: "https://help.vicon.com/space/Shogun16/13340626/Use%20Auto-Skeleton"
format: markdown
---
Auto-Skeleton (AS) is an alternative to live solving subject calibration, providing you with a way to generate an optimized, controllable, second-solve skeleton.

The way in which you use Auto-Skeleton depends on whether you have already created a VSS (Vicon Solving Setup file) and how much of it you want to keep.

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> 
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When using Auto-Skeleton, note these points:

- In these sections, the marker set used is assumed to be one of the standard marker sets that are supplied by Vicon.
- Auto-Skeleton is compatible with VRA (Vicon Remarkable Actions) and does not affect it.
- Auto-Skeleton removes all solving parameterization because it's not used by Auto-Skeleton. It sets bone lengths and constraint offsets directly.
- You can run Auto-Skeleton on an existing setup, for example, one previously calibrated in Live. However, with files earlier than Shogun 1.5, before you use Auto-Skeleton, you may need to replace the existing template by loading the equivalent template from 1.5 or later, if available.

For further hints and tips, see [Get the best results from Auto-Skeleton](https://vicon-help.atlassian.net/wiki/spaces/Shogun16/pages/13340635).

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## If you have no VSS calibration

1. In Shogun Post, load a ROM or at least a labeled T- or A-pose.
2. In the **Subject Setup** panel, click the **Solving** tab, and then the **Actor Setup** tab.
3. Set the current frame to a good T- or A-pose.
4. Choose a template VSS and skin. If no templates are displayed, ensure the path to the templates is added in the **Preferences** dialog box.
5. Ensure **Use Auto-Skeleton** is selected.
6. Click the **AS Calibrate** button.   
The skeleton is scaled and posed,
7. If necessary, adjust any settings that require refinement (see [Adjust Auto-Skeleton results](https://vicon-help.atlassian.net/wiki/spaces/Shogun16/pages/13340632)).
8. Solve and review the motion.
9. When you're happy with the result, export the VSS.

## If you have a VSS and want to use its bone lengths, but calculate new constraint offsets

1. In Shogun Post, load a ROM or at least a labeled T- or A-pose.
2. In the **Subject Setup** panel, click the **Solving** tab, and then the **Actor Setup** tab.
3. Set the current frame to a good T- or A-pose.
4. in the Subject Setup panel toolbar, click the Import Solving Setup button > Macro (inline-media-image)

 and load your VSS.
5. Ensure **Use Auto-Skeleton** is selected.
6. To the right of the **AS Calibrate** button, click the **Show options** ellipsis (...) and select **Use Existing Bone Lengths**.
7. Click the **AS Calibrate** button.  
In the 3D Scene, the skeleton is posed.
8. Make any adjustments necessary (see [Adjust Auto-Skeleton results](https://vicon-help.atlassian.net/wiki/spaces/Shogun16/pages/13340632)).
9. Solve and review motion.
10. When you're happy with the result, export the VSS.

## If you have a VSS but want to replace itentirely

1. In Shogun Post, load a ROM or at least a labeled T- or A-pose.
2. In the **Subject Setup** panel, click the **Solving** tab, and then the **Actor Setup** tab.
3. In the **Subject Setup** panel toolbar, click the **Remove Solving Setup** button > Macro (inline-media-image)

 to remove the existing setup.
4. Follow steps 3–9 in [If you have no VSS calibration](#NoVSS).

# Use a VSS created with Auto-Skeleton in Shogun Live

Auto-Skeleton is just an alternative way to create a VSS for an actor. After running Auto-Skeleton, you can export the resulting VSS and use it in Live.

Because Auto-Skeleton removes parameterization, you can't recalibrate the VSS in Shogun Live. If you want to do this, go back to Shogun Post and re-run Auto-Skeleton on a T-pose containing the new marker positions and ensure that the **Use Existing Bone Lengths** option is selected.

- Auto-Skeleton is compatible with VRA (Vicon Remarkable Actions) and does not interfere with it.
- Because solving parameterization is not used by Auto-Skeleton and it sets bone length and constraint offsets directly, Auto-Skeleton removes all solving parameterization.
- You can run Auto-Skeleton on an existing setup, for example, a setup previously calibrated in Live. However, with files earlier than Shogun 1.5, before you use Auto-Skeleton, you may need to replace the existing template by loading the equivalent template from 1.5 or later, if available.