> 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-studio-authoring/virtual-entities/special-virtual-objects.md).

# Special Virtual Objects

Special Virtual Objects are public Virtual Objects that exist in the HyperSkill public repository. These Virtual Objects have built-in special interactions that must be set up.

Special Virtual Objects are public VOs with built-in behavior. Most are set up by adding customizable attributes to the VO in authoring mode. Pick one below for its attributes and setup.

* [Train](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/train.md) - a vehicle the player can enter.
* [Digital Caliper](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/digital-caliper.md) - measure objects in VR.
* [Blur](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/blur.md) - blur anything seen through it.
* [Crossbow](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/crossbow.md) - shoot another VO.
* [Picture Frame](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/picture-frame.md) - show a 2D image in 3D space.
* [Drone](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/drone.md) - fly a drone around.
* [Painting](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/painting.md) - spray painting and pens (setup, spray painting, pen).
* [Timer Display](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/timer-display.md) - show a timer on a VO.
* [Text Display](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/text-display.md) - show custom text.
* [Graph](/hyperskill-studio-authoring/virtual-entities/special-virtual-objects/graph.md) - show a scatter plot.