Is it possible to have a map in a box like this

And even have a floating water plane with it?

link them both to the fram as seperate so like this

frame
~outerbox
~inerbox

not like this

frame
~outerbox
~~inerbox

~ = 1 space

otherwise tool reads that the outside box is the level and the inner is just there so then when you go into sapien you will have to manually put the values in so that e.g a tress sits on the innerbox, otherwise the tree wousld sit on the outerbox,

hope that makes sence

So basically everything would be linked to the frame and not to each other.

yea correct