When set to true, this will allow you to create subdivisions inside of each other.
By default inner subclaims will not inherit the permissions of the parent subclaim, unlike the first child subclaim; you will need to /trust players manually to nested subclaims.
Fixed a weird quirk where trusted parent players were not listed in the /trustlist of subclaims.
You will now have to use /3dsubdivideclaim command to activate the 3D Subdivisions mode. 1-layer high 3D subdivisions are now possible via the /3dsubdivideclaim command.