> For the complete documentation index, see [llms.txt](https://docs.siminsights.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.siminsights.com/hyperskill/authoring-a-simulation/object-groups.md).

# Object Groups

Virtual Object groups share the following characteristics:

* Multiple VO groups can be created, and a Virtual Object can belong to more than one group.
* If a Hitbox is added to the VO Group, all members of the VO Group must have a Hitbox with the same name.
* Adding an attribute to the VO Group will create that attribute on all members of the VO Group during experience time with the same initial value. A customizable attribute with the same Attribute Type and name as a VO Group will override the VO Group's attribute value if the VO is a part of the VO Group.<br>