Custom Connect Screen
Since Onset 1.2.2 the client can display a web UI while connecting and downloading files from a server. The page to show is hosted on the game server directly and can be configured in the server_config.json. This feature is optional.
Put your html and other web files in the public_html folder of the server. If it does not exist, create the directory. The connect screen can't load content from the internet. Everything has to be inside your public_html folder.
In your server_config.json configure the page that you want to be shown.
In this case it will display loadingscreen.html from your public_html folder.
To enable the cursor during the connect screen you can set the following:
Example video showing a custom screen: https://www.youtube.com/watch?v=t-OYr2jkmfE
Download example connect screen from the video above: loadingscreen.zip