<radius>
in the next step./iris pregen start <radius>
/iris pregen start <radius> world=<worldName>
iris pregen start <radius> world=<worldName>
<worldName>
is the name of the world. When entering the command, you may have to select a world. As a player, click the option in chat. As console, type the option in the input bar and hit enter.<radius>
to select is based on preference and use-case.