---
title: "Create basic objects"
canonical: "https://help.vicon.com/space/Evoke18/397968685/Create%20basic%20objects"
format: markdown
---
To represent your props, you create basic objects in Evoke.

**To create a basic object:**

1. Place the prop in the volume. If you're using Nova or SuperNova strands, make sure that the markers are turned on.
  :check_mark: **Tip**: If you don't see anything in the 3D View, in the **View Filters**, ensure **Unlabeled Markers** is selected.
2. In Evoke, select at least four unlabeled reconstructions—five or more is recommended (Alt+drag or drag only, if the option ***Alt***** key to select in views** is cleared in **Preferences**).  
The orientation of the object depends on the order in which you select the reconstructions. The first is the root, the second is the axis it will point along, and the third is the Up vector for the object. If necessary, you can change this later (see [Change a basic object's origin](https://vicon-help.atlassian.net/wiki/spaces/Evoke18/pages/397968713)).
3. In the **Tracking Setup** panel, click the **Create** button for a basic object.
  A new basic object is created with labeled markers and sticks.
  In the **Tracking** panel, a new basic object (default name: **BasicObject#**) is displayed.
  :check_mark: **Tip**: If your new object has a warning symbol (yellow triangle) next to it, to view information about the issue, hover the mouse pointer over the symbol. For more information, see [Understand object evaluation](https://vicon-help.atlassian.net/wiki/spaces/Evoke18/pages/397968808).
4. Enter a unique new name for the basic object.

After you have created your basic object, you can then add a mesh to it. For more information, see [Add a mesh to a basic object](https://vicon-help.atlassian.net/wiki/spaces/Evoke18/pages/397968704).

## Rename basic objects

You may need to rename basic objects, for example, to match their intended location (eg, `Green_LeftHand` or `Red_RightFoot`). You can rename basic objects in either the Tracking Setup panel or the Tracking panel.


    **To rename basic objects:**


1. Choose whether to use the Tracking panel or the Tracking Setup panel:
  - In the tree at the top of the **Tracking** panel, do one of the following:
    - Double-click the basic object; or
    - Right-click the basic object and then select **Rename**; or
    - Select the basic object and press F2.
  Or
  - In the **Tracking Setup** panel, click in the **Basic Object** field.
2. Enter a unique new name for the basic object.

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## 
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    Create a custom calibration object


You can use a Vicon Active Wand to quickly set up your volume coordinate system (see [Set the volume origin](https://vicon-help.atlassian.net/wiki/spaces/Evoke18/pages/397969019)). However, using a larger calibration object (for example, markers embedded in the volume floor and wall) can improve calibration stability and consistency over time.

For information on how to do this, see [Scale calibration and set a fixed origin](https://vicon-help.atlassian.net/wiki/spaces/Evoke18/pages/397969130).