A free mod for Valheim, by 74oshua.
GamanMaker is a mod for Valheim that allows you to do things that weren't possible before.
The most important of these is the ability to set the current weather for every player on the server.
The other is the creation of a new type of command.
The way that this works is that it's enabled for use on a server, then you will be able to use the new command.
After that, you will be able to see all the players on your server.
You can then use the new command to hide the player from your view.