> 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/state-machine/actions/transition-effect.md).

# Transition Effect

Transition effects allow you to fade in and out the environment scene. This can be used indicate to the user that time has passed or hiding parts of the simulation that you do not want the user to see, such as environment setup or teardown actions.&#x20;

Effect: **Fade Out** turns the screen black. **Fade In** removes the fade out effect and brings back the scene to view. Usually, these actions are used together.&#x20;

Duration: How long in seconds should the effect take.&#x20;

Proceed Without Finishing: If active, subsequent state actions will continue while the effect occurs.&#x20;