i tryed around with cave layers in worldpainter and this is what came out of this.
i think it is kind of nice.

this is a very good location for your creativ builds
you can do whith this what ever you want to do. if you repost this pleas give a link to this projekt. and write a coment here with a link to your projekt 

iam looking forward to see your buildings on the island

some pictures :

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if you like it dont forget to give a diamond and favorite