Module sets lock screen to chosen image. It also allows to change Lock screen if setting is managed by your company.
Set-LockScreen -ImagePath D:\OneDrive\InitPC\JustDoThings.png -Verbose
To install module use
Install-Module -Name ProductivityTools.PSSetLockScreen
Script adds new node to regedit PersonalizationCSP which contains information where to found image displayed on lock screen.
Script copy chosen image to C:\Windows\System32 path.
Both actions required administrator permissions so you need to run PowerShell as administrator.
Module depends on ProductivityTools.PSTestIfAdmin, which is installed automatically after invoking above command.